Re: Pixelated, Regional Topograpy Data
Joaquim Luis <[email protected]> Mon, 11 Aug 2014 23:23:40 -0700
| Newsgroups | gmane.comp.gis.gmt.user |
|---|---|
| Message-ID | <[email protected]> |
--Apple-Mail-71A492FE-4F63-4A37-B06E-F86133966786 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Look around in that site. You have the grids ready to use at ftp://topex.ucsd.edu/pub/srtm30_plus/srtm30/grd/ Now, you have to find the one(s) that suits your need (something that the to= ol I pointed out in my first mail would for you) Sent from my iPadiola > On 11/08/2014, at 17:14, "Gregory (Greg) Brenn" <[email protected]> w= rote: >=20 > Ok awesome. >=20 > Now I am hoping to take ASCII xyz bathymetry data from this website :http:= //topex.ucsd.edu/cgi-bin/get_data.cgi , but I can't seem to figure out how t= o save it as an xyz file, which I could then convert to a .grd file in GMT. = I seem to only save it as a .txt file... > Any thoughts? >=20 >=20 >=20 >> On Mon, Aug 11, 2014 at 4:32 PM, Becker, Joseph J. <Joseph.Becker.ctr@nrl= ssc.navy.mil> wrote: >> I notice the SRTM v.3 land data is now also being called "srtm plus" on t= hat web page. >>=20 >> This is the link to the bathymetry that Joaquim is recommending=E2=80=A6 >>=20 >> http://topex.ucsd.edu/WWW_html/srtm30_plus.html >>=20 >> The grid has a 30 arc second pitch, and while the land is at that resolut= ion, the bathymetry has that resolution only at those relatively few locatio= ns where multi beam data was publicly available in 2008. At most locations t= he bathymetry resolution might be analogized as correct but low pass filtere= d at a resolution of a few arc minutes. >>=20 >> -jj >>=20 >>=20 >>=20 >> On Aug 11, 2014, at 2:50 PM, Joaquim Luis <[email protected]<mailto:jmflu= [email protected]>> wrote: >>=20 >> Use the SRTM+ (SRTM plus). >> It's the best one of its class (30 sec resolution -- sometimes true, othe= rs a bit less true) >>=20 >> Sent from my iDedo >>=20 >> No dia 11/08/2014, =C3=A0s 11:41, Gregory Brenn <[email protected]<m= ailto:[email protected]>> escreveu: >>=20 >> I used SRTM, and the topography looks great. I created a nice script. N= ow I want to add bathymetry data to the map that I overlaid earthquakes with= . Do you have any recommendations for where to get high-quality bathymetry d= ata, such as from GEBCO? >>=20 >>=20 >> On Aug 11, 2014, at 1:21 PM, Joaquim Luis <[email protected]<mailto:jmflu= [email protected]>> wrote: >>=20 >> On 11/08/2014, at 09:23, "Fielding, Eric J (329A)" <[email protected]= ASA.GOV<mailto:[email protected]>> wrote: >>=20 >> The new SRTM v.3 has merged ASTER to fill voids. SRTM is better in almost= every location outside of voids. >>=20 >> And it takes 9 times less disk space >>=20 >> Joaquim >>=20 >>=20 >> Sent from my iPadiola >>=20 >>=20 >> ++Eric >>=20 >> Sent from my iPhone >>=20 >> On Aug 11, 2014, at 12:17, "Becker, Joseph J." <Joseph.Becker.ctr@NRLSSC.= NAVY.MIL<mailto:[email protected]>> wrote: >>=20 >> I forgot to mention that we now combine the SRTM land data with the ASTER= data which is also available for free. Outside of the US, the ASTER data is= , as I recall, the highest generally available resolution, however it is noi= sy; e.g.; a tile near the Galapagos has a few points indicating ~7,000m elev= ation on Isla Darwin. >>=20 >> We take all the land data we can get easily and block median it together f= or that reason. Simply taking an average would not work well. And the GMT to= ols are fast so the extra computer time is negligible=E2=80=A6 >>=20 >> -jj >>=20 >>=20 >> On Aug 11, 2014, at 10:38 AM, JJ Becker <[email protected]= l<mailto:[email protected]><mailto:joseph.becker.ctr@nrlssc.= navy.mil>> wrote: >>=20 >> I make the SRTM30_PLUS file(s) that were mention. If you=E2=80=99d like t= o make your own at a higher resolution here is what I do: >>=20 >> a bit of byte swapping on the HGT format file(s), >> (optionally cat several altogether in a tmp file), >> (optionally) block median the small tiles together to get the final resol= ution you would like, >> and grid. >>=20 >>=20 >> grd2xyz $cgiar -s -bo3 -V | >> blockmedian -bi3 -bo3 -I$resolution -R$minX/$maxX/$minY/$maxY -C -V | \ >> xyz2grd -bi -G$grd -R$minX/$maxX/$minY/$maxY -I$resolution -V >>=20 >>=20 >> The block median options can be used to handle the possibly troubling iss= ues arising from the question of what location to pick when selecting the me= dian height from a cloud of neighboring points (aka the center of the down s= ampled pixel, the average location of the cloud, the location whose height h= appens to be the median, etc=E2=80=A6) >>=20 >> -jj >>=20 >> On Aug 9, 2014, at 3:13 PM, Gregory (Greg) Brenn <[email protected]<= mailto:[email protected]><mailto:[email protected]>> wrote: >>=20 >> Ok, >>=20 >> That's great. I downloaded an unzipped .hgt files, so what do you think w= ould be the best way to convert the .hgt files (I have 4 that I want to conv= ert) into .grd files, then stich those files together? Could I use xyz2grd a= nd then use grdpaste? >>=20 >> Thanks a lot for your help. >> Greg >>=20 >>=20 >> On Sat, Aug 9, 2014 at 2:44 PM, Fielding, Eric J (329A) <eric.j.fielding@= jpl.nasa.gov<mailto:[email protected]><mailto:eric.j.fielding@jpl= .nasa.gov>> wrote: >> Yes, as Walter mentioned, the SRTM 3-arcsecond (~90 m) digital topography= >> is available for most of the Earth (up to 60 degrees N & S latitudes), an= d >> it is much higher resolution than the ETOPO1 data that is 1-arcminute or >> about 2 km spacing. The latest release is SRTM version 3.0. The Open >> Topography website has a new service that will assemble the data and >> provide the output in three formats >> (http://www.opentopography.org/index.php/news/detail/srtm_version_30_glob= al >> _90m_and_united_states_30m_elevation_data_now_availab/<http://www.opentop= ography.org/index.php/news/detail/srtm_version_30_global_90m_and_united_stat= es_30m_elevation_data_now_availab/>). The GeoTIFF files >> are easy to convert to GMT .grd files with GDAL. >>=20 >> ++Eric Fielding >>=20 >>=20 >> -----Original Message----- >> From: "Walter Smith (HF)" <[email protected]<mailto:walter.hf.sm= [email protected]><mailto:[email protected]>> >> Reply-To: World-Wide GMT Usage and Help Mailing List >> <[email protected]<mailto:[email protected]><mailto:GMT-H= [email protected]>> >> Date: Saturday, August 9, 2014 11:04 AM >> To: "[email protected]<mailto:[email protected]><mailto:G= [email protected]>" <[email protected]<mailto:GMT-HELP@LISTS.= HAWAII.EDU><mailto:[email protected]>> >> Subject: Re: [GMT-HELP] Pixelated, Regional Topograpy Data >>=20 >> =C2=B3pscoast=C2=B2 is defaulting to a low resolution coastline. Try addi= ng -Df or >> check the usage message to get your highest option. >>=20 >> There is higher resolution topography than ETOPO1, such as SRTM3. You=C2=B9= ll >> have to search around and you may have to assemble it from a few tiles >> that you may have to download separately. >>=20 >> Walter >>=20 >> On Aug 9, 2014, at 1:50 PM, Gregory (Greg) Brenn <[email protected]<= mailto:[email protected]><mailto:[email protected]>> >> wrote: >>=20 >> Hello, >>=20 >> New user of GMT here, and I'm attempting to create a map of Costa Rica >> and overlay coastlines and earthquake locations. Here is my Script: >>=20 >> #!/bin/bash >>=20 >> clear >>=20 >> xyz2grd COSTARIC-6565.xyz -Gcostarica.grd -R-87/-84/9/11 -I2m -V >>=20 >> grdimage costarica.grd -JM12 -K -Cmy-topo.cpt -R-87/-84/9/11 >> map.ps<ht= tp://map.ps/> >>=20 >> pscoast -V -O -K -JM -R -W1 >> mappy.ps<http://mappy.ps/> >>=20 >> psxy loc.txt -JM12 -R-87/-84/9/11 -Sc.1 -G'45/59/100' -B1/1 -O >> map.ps<= http://map.ps/> >> gv map.ps<http://map.ps/> >>=20 >>=20 >>=20 >> I am using a generic color palette which I can change easily, but the >> coastlines are extremely low quality, and the topography is extremely >> pixelated. >>=20 >> I look at images in papers, and there's extremely high quality >> topographic images of COsta Rica, for example, as well as the coastlines >> and bathymetry, but I have no idea where I can get this high-quality >> data. I have tried to get ETOPO data, but I cannot seem to find where >> to get high-quality data. >>=20 >> So I guess my question is, is ETOPO1 the best place to get high-quality >> topo data, because I cannot seem to figure out how to download data from >> their website. Also, would I need to download coastline data, as well? >>=20 >>=20 >>=20 >> Thanks, >>=20 >> Greg >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you >> have found a bug, discuss it here first. To formally report bugs or >> request features, please register and add New Issue on >> gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/><http://gmt.soest.hawai= i.edu/> To unsubscribe, send the message "signoff gmt-help" >> to [email protected]<mailto:[email protected]><mailto:lis= [email protected]> Note: gmt-help will become obsolete on Sept >> 1, 2014 - please use forum on gmt.soest.hawaii.edu<http://gmt.soest.hawai= i.edu/><http://gmt.soest.hawaii.edu/> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you >> have found a bug, discuss it here first. >> To formally report bugs or request features, please register and add New >> Issue on gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/><http://gmt.so= est.hawaii.edu/> >> To unsubscribe, send the message "signoff gmt-help" to >> [email protected]<mailto:[email protected]><mailto:listse= [email protected]> >> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on= >> gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/><http://gmt.soest.hawai= i.edu/> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you h= ave found a bug, discuss it here first. >> To formally report bugs or request features, please register and add New I= ssue on gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/><http://gmt.soest.= hawaii.edu/> >> To unsubscribe, send the message "signoff gmt-help" to [email protected]= aii.edu<mailto:[email protected]><mailto:[email protected]> >> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on= gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/><http://gmt.soest.hawaii.= edu/> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you ha= ve found a bug, discuss it here first. To formally report bugs or request fe= atures, please register and add New Issue on gmt.soest.hawaii.edu<http://gmt= .soest.hawaii.edu/><http://gmt.soest.hawaii.edu/> To unsubscribe, send the m= essage "signoff gmt-help" to [email protected]<mailto:listserv@lists= .hawaii.edu><mailto:[email protected]> Note: gmt-help will become ob= solete on Sept 1, 2014 - please use forum on gmt.soest.hawaii.edu<http://gmt= .soest.hawaii.edu/><http://gmt.soest.hawaii.edu/> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you h= ave found a bug, discuss it here first. >> To formally report bugs or request features, please register and add New I= ssue on gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/> >> To unsubscribe, send the message "signoff gmt-help" to [email protected]= aii.edu<mailto:[email protected]> >> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on= gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you h= ave found a bug, discuss it here first. >> To formally report bugs or request features, please register and add New I= ssue on gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/> >> To unsubscribe, send the message "signoff gmt-help" to [email protected]= aii.edu<mailto:[email protected]> >> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on= gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you h= ave found a bug, discuss it here first. >> To formally report bugs or request features, please register and add New I= ssue ongmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/> >> To unsubscribe, send the message "signoff gmt-help" to [email protected]= aii.edu<mailto:[email protected]> >> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on= gmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you ha= ve found a bug, discuss it here first. To formally report bugs or request fe= atures, please register and add New Issue on gmt.soest.hawaii.edu<http://gmt= .soest.hawaii.edu/> To unsubscribe, send the message "signoff gmt-help" to l= [email protected]<mailto:[email protected]> Note: gmt-help wi= ll become obsolete on Sept 1, 2014 - please use forum on gmt.soest.hawaii.ed= u<http://gmt.soest.hawaii.edu/> instead. >> Mailing list for GMT discussions of all kinds. If you are not sure you ha= ve found a bug, discuss it here first. To formally report bugs or request fe= atures, please register and add New Issue on gmt.soest.hawaii.edu<http://gmt= .soest.hawaii.edu> To unsubscribe, send the message "signoff gmt-help" to li= [email protected]<mailto:[email protected]> Note: gmt-help wil= l become obsolete on Sept 1, 2014 - please use forum on gmt.soest.hawaii.edu= <http://gmt.soest.hawaii.edu> instead. >>=20 >> Mailing list for GMT discussions of all kinds. If you are not sure you h= ave found a bug, discuss it here first. >> To formally report bugs or request features, please register and add New I= ssue on gmt.soest.hawaii.edu >> To unsubscribe, send the message "signoff gmt-help" to [email protected]= aii.edu >> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on= gmt.soest.hawaii.edu instead. >=20 > Mailing list for GMT discussions of all kinds. If you are not sure you hav= e found a bug, discuss it here first. To formally report bugs or request fea= tures, please register and add New Issue on gmt.soest.hawaii.edu To unsubscr= ibe, send the message "signoff gmt-help" to [email protected] Note: g= mt-help will become obsolete on Sept 1, 2014 - please use forum on gmt.soest= .hawaii.edu instead. Mailing list for GMT discussions of all kinds. If you are not sure you have found a bug, discuss it here first. To formally report bugs or request features, please register and add New Issue on gmt.soest.hawaii.edu To unsubscribe, send the message "signoff gmt-help" to [email protected] Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on gmt.soest.hawaii.edu instead. --Apple-Mail-71A492FE-4F63-4A37-B06E-F86133966786 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D= utf-8"></head><body dir=3D"auto"><div style=3D"-webkit-text-size-adjust: aut= o;">Look around in that site. You have the grids ready to use at</div><div s= tyle=3D"-webkit-text-size-adjust: auto;"><br></div><div><span style=3D"-webk= it-text-size-adjust: auto;"><a href=3D"ftp://topex.ucsd.edu/pub/srtm30_plus/= srtm30/grd/">ftp://topex.ucsd.edu/pub/srtm30_plus/srtm30/grd/</a></span></di= v><div style=3D"-webkit-text-size-adjust: auto;"><br></div><div style=3D"-we= bkit-text-size-adjust: auto;">Now, you have to find the one(s) that suits yo= ur need (something that the tool I pointed out in my first mail would for yo= u)</div><div style=3D"-webkit-text-size-adjust: auto;"><br>Sent from my iPad= iola</div><div style=3D"-webkit-text-size-adjust: auto;"><br>On 11/08/2014, a= t 17:14, "Gregory (Greg) Brenn" <<a href=3D"mailto:[email protected]= ">[email protected]</a>> wrote:<br><br></div><blockquote type=3D"cit= e" style=3D"-webkit-text-size-adjust: auto;"><div><div dir=3D"ltr">Ok awesom= e.<div><br></div><div>Now I am hoping to take ASCII xyz bathymetry data from= this website :<a href=3D"http://topex.ucsd.edu/cgi-bin/get_data.cgi">http:/= /topex.ucsd.edu/cgi-bin/get_data.cgi</a> , but I can't seem to figure o= ut how to save it as an xyz file, which I could then convert to a .grd file i= n GMT. I seem to only save it as a .txt file...</div> <div>Any thoughts?</div><div><br></div></div><div class=3D"gmail_extra"><br>= <br><div class=3D"gmail_quote">On Mon, Aug 11, 2014 at 4:32 PM, Becker, Jose= ph J. <span dir=3D"ltr"><<a href=3D"mailto:[email protected].= mil" target=3D"_blank">[email protected]</a>></span> wrot= e:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px= #ccc solid;padding-left:1ex">I notice the SRTM v.3 land data is now also be= ing called "srtm plus" on that web page.<br> <br> This is the link to the bathymetry that Joaquim is recommending=E2=80=A6<br>= <br> <a href=3D"http://topex.ucsd.edu/WWW_html/srtm30_plus.html" target=3D"_blank= ">http://topex.ucsd.edu/WWW_html/srtm30_plus.html</a><br> <br> The grid has a 30 arc second pitch, and while the land is at that resolution= , the bathymetry has that resolution only at those relatively few locations w= here multi beam data was publicly available in 2008. At most locations the b= athymetry resolution might be analogized as correct but low pass filtered at= a resolution of a few arc minutes.<br> <br> -jj<br> <div class=3D""><br> <br> <br> On Aug 11, 2014, at 2:50 PM, Joaquim Luis <<a href=3D"mailto:jmfluis@GMAI= L.COM">[email protected]</a><mailto:<a href=3D"mailto:[email protected]">= [email protected]</a>>> wrote:<br> <br> Use the SRTM+ (SRTM plus).<br> It's the best one of its class (30 sec resolution -- sometimes true, others a= bit less true)<br> <br> Sent from my iDedo<br> <br> </div>No dia 11/08/2014, =C3=A0s 11:41, Gregory Brenn <<a href=3D"mailto:= [email protected]">[email protected]</a><mailto:<a href=3D"mail= to:[email protected]">[email protected]</a>>> escreveu:<br> <div class=3D""><br> I used SRTM, and the topography looks great. I created a nice script. &= nbsp;Now I want to add bathymetry data to the map that I overlaid earthquake= s with. Do you have any recommendations for where to get high-quality b= athymetry data, such as from GEBCO?<br> <br> <br> </div>On Aug 11, 2014, at 1:21 PM, Joaquim Luis <<a href=3D"mailto:jmflui= [email protected]">[email protected]</a><mailto:<a href=3D"mailto:jmfluis@GMAIL= .COM">[email protected]</a>>> wrote:<br> <div class=3D""><br> On 11/08/2014, at 09:23, "Fielding, Eric J (329A)" <<a href=3D"mailto:eri= [email protected]">[email protected]</a><mailto:<a hre= f=3D"mailto:[email protected]">[email protected]</a>&g= t;> wrote:<br> <br> The new SRTM v.3 has merged ASTER to fill voids. SRTM is better in almost ev= ery location outside of voids.<br> <br> And it takes 9 times less disk space<br> <br> Joaquim<br> <br> <br> Sent from my iPadiola<br> <br> <br> ++Eric<br> <br> Sent from my iPhone<br> <br> </div><div class=3D"">On Aug 11, 2014, at 12:17, "Becker, Joseph J." <<a h= ref=3D"mailto:[email protected]">[email protected]= VY.MIL</a><mailto:<a href=3D"mailto:[email protected]">Jo= [email protected]</a>>> wrote:<br> <br> I forgot to mention that we now combine the SRTM land data with the ASTER da= ta which is also available for free. Outside of the US, the ASTER data is, a= s I recall, the highest generally available resolution, however it is noisy;= e.g.; a tile near the Galapagos has a few points indicating ~7,000m elevati= on on Isla Darwin.<br> <br> We take all the land data we can get easily and block median it together for= that reason. Simply taking an average would not work well. And the GMT tool= s are fast so the extra computer time is negligible=E2=80=A6<br> <br> -jj<br> <br> <br> </div><div class=3D"">On Aug 11, 2014, at 10:38 AM, JJ Becker <<a href=3D= "mailto:[email protected]">[email protected]= </a><mailto:<a href=3D"mailto:[email protected]">joseph.b= [email protected]</a>><mailto:<a href=3D"mailto:joseph.becker.= [email protected]">[email protected]</a>>> wrote:<br= > <br> I make the SRTM30_PLUS file(s) that were mention. If you=E2=80=99d like to m= ake your own at a higher resolution here is what I do:<br> <br> a bit of byte swapping on the HGT format file(s),<br> (optionally cat several altogether in a tmp file),<br> (optionally) block median the small tiles together to get the final resoluti= on you would like,<br> and grid.<br> <br> <br> grd2xyz $cgiar -s -bo3 -V |<br> blockmedian -bi3 -bo3 -I$resolution -R$minX/$maxX/$minY/$maxY -C -V | \<br> xyz2grd -bi -G$grd -R$minX/$maxX/$minY/$maxY -I$resolution -V<br> <br> <br> The block median options can be used to handle the possibly troubling issues= arising from the question of what location to pick when selecting the media= n height from a cloud of neighboring points (aka the center of the down samp= led pixel, the average location of the cloud, the location whose height happ= ens to be the median, etc=E2=80=A6)<br> <br> -jj<br> <br> </div><div class=3D"">On Aug 9, 2014, at 3:13 PM, Gregory (Greg) Brenn <<= a href=3D"mailto:[email protected]">[email protected]</a><mailt= o:<a href=3D"mailto:[email protected]">[email protected]</a>>&l= t;mailto:<a href=3D"mailto:[email protected]">[email protected]</a= >>> wrote:<br> <br> Ok,<br> <br> That's great. I downloaded an unzipped .hgt files, so what do you thin= k would be the best way to convert the .hgt files (I have 4 that I want to c= onvert) into .grd files, then stich those files together? Could I use x= yz2grd and then use grdpaste?<br> <br> Thanks a lot for your help.<br> Greg<br> <br> <br> </div><div class=3D"">On Sat, Aug 9, 2014 at 2:44 PM, Fielding, Eric J (329A= ) <<a href=3D"mailto:[email protected]">[email protected]= sa.gov</a><mailto:<a href=3D"mailto:[email protected]">eric.j.= [email protected]</a>><mailto:<a href=3D"mailto:eric.j.fielding@jp= l.nasa.gov">[email protected]</a>>> wrote:<br> Yes, as Walter mentioned, the SRTM 3-arcsecond (~90 m) digital topography<br= > is available for most of the Earth (up to 60 degrees N & S latitudes), a= nd<br> it is much higher resolution than the ETOPO1 data that is 1-arcminute or<br>= about 2 km spacing. The latest release is SRTM version 3.0. The Open<br> Topography website has a new service that will assemble the data and<br> provide the output in three formats<br> (<a href=3D"http://www.opentopography.org/index.php/news/detail/srtm_version= _30_global _90m_and_united_states_30m_elevation_data_now_availab/" target=3D"_blank">ht= tp://www.opentopography.org/index.php/news/detail/srtm_version_30_global<br>= _90m_and_united_states_30m_elevation_data_now_availab/</a><<a href=3D"htt= p://www.opentopography.org/index.php/news/detail/srtm_version_30_global_90m_= and_united_states_30m_elevation_data_now_availab/" target=3D"_blank">http://= www.opentopography.org/index.php/news/detail/srtm_version_30_global_90m_and_= united_states_30m_elevation_data_now_availab/</a>>). The GeoTIFF files<br= > are easy to convert to GMT .grd files with GDAL.<br> <br> ++Eric Fielding<br> <br> <br> -----Original Message-----<br> </div><div class=3D"">From: "Walter Smith (HF)" <<a href=3D"m= ailto:[email protected]">[email protected]</a><mailto:<a hr= ef=3D"mailto:[email protected]">[email protected]</a>><m= ailto:<a href=3D"mailto:[email protected]">[email protected]</= a>>><br> Reply-To: World-Wide GMT Usage and Help Mailing List<br> </div><div class=3D""><<a href=3D"mailto:[email protected]">GMT-H= [email protected]</a><mailto:<a href=3D"mailto:[email protected]= DU">[email protected]</a>><mailto:<a href=3D"mailto:GMT-HELP@L= ISTS.HAWAII.EDU">[email protected]</a>>><br> Date: Saturday, August 9, 2014 11:04 AM<br> </div><div class=3D"">To: "<a href=3D"mailto:[email protected]">GMT-= [email protected]</a><mailto:<a href=3D"mailto:[email protected].= EDU">[email protected]</a>><mailto:<a href=3D"mailto:GMT-HELP@= LISTS.HAWAII.EDU">[email protected]</a>>" <<a href=3D"mailto:G= [email protected]">[email protected]</a><mailto:<a href=3D= "mailto:[email protected]">[email protected]</a>><mail= to:<a href=3D"mailto:[email protected]">[email protected]</a= >>><br> Subject: Re: [GMT-HELP] Pixelated, Regional Topograpy Data<br> <br> =C2=B3pscoast=C2=B2 is defaulting to a low resolution coastline. Try adding -= Df or<br> check the usage message to get your highest option.<br> <br> There is higher resolution topography than ETOPO1, such as SRTM3. You=C2=B9l= l<br> have to search around and you may have to assemble it from a few tiles<br> that you may have to download separately.<br> <br> Walter<br> <br> </div>On Aug 9, 2014, at 1:50 PM, Gregory (Greg) Brenn <<a href=3D"mailto= :[email protected]">[email protected]</a><mailto:<a href=3D"mai= lto:[email protected]">[email protected]</a>><mailto:<a href= =3D"mailto:[email protected]">[email protected]</a>>><br> <div><div class=3D"h5">wrote:<br> <br> Hello,<br> <br> New user of GMT here, and I'm attempting to create a map of Costa Rica<br> and overlay coastlines and earthquake locations. Here is my Script:<br= > <br> #!/bin/bash<br> <br> clear<br> <br> xyz2grd COSTARIC-6565.xyz -Gcostarica.grd -R-87/-84/9/11 -I2m -V<br> <br> grdimage costarica.grd -JM12 -K -Cmy-topo.cpt -R-87/-84/9/11 >> <a hre= f=3D"http://map.ps" target=3D"_blank">map.ps</a><<a href=3D"http://map.ps= /" target=3D"_blank">http://map.ps/</a>><br> <br> pscoast -V -O -K -JM -R -W1 >> <a href=3D"http://mappy.ps" target=3D"_= blank">mappy.ps</a><<a href=3D"http://mappy.ps/" target=3D"_blank">http:/= /mappy.ps/</a>><br> <br> psxy loc.txt -JM12 -R-87/-84/9/11 -Sc.1 -G'45/59/100' -B1/1 -O >> <a h= ref=3D"http://map.ps" target=3D"_blank">map.ps</a><<a href=3D"http://map.= ps/" target=3D"_blank">http://map.ps/</a>><br> gv <a href=3D"http://map.ps" target=3D"_blank">map.ps</a><<a href=3D"http= ://map.ps/" target=3D"_blank">http://map.ps/</a>><br> <br> <br> <br> I am using a generic color palette which I can change easily, but the<br> coastlines are extremely low quality, and the topography is extremely<br> pixelated.<br> <br> I look at images in papers, and there's extremely high quality<br> topographic images of COsta Rica, for example, as well as the coastlines<br>= and bathymetry, but I have no idea where I can get this high-quality<br> data. I have tried to get ETOPO data, but I cannot seem to find where<= br> to get high-quality data.<br> <br> So I guess my question is, is ETOPO1 the best place to get high-quality<br> topo data, because I cannot seem to figure out how to download data from<br>= their website. Also, would I need to download coastline data, as well?= <br> <br> <br> <br> Thanks,<br> <br> Greg<br> <br> Mailing list for GMT discussions of all kinds. If you are not sure you<br> have found a bug, discuss it here first. To formally report bugs or<br> request features, please register and add New Issue on<br> </div></div><a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.so= est.hawaii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_bl= ank">http://gmt.soest.hawaii.edu/</a>><<a href=3D"http://gmt.soest.haw= aii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>> To unsubscr= ibe, send the message "signoff gmt-help"<br> to <a href=3D"mailto:[email protected]">[email protected]</a= ><mailto:<a href=3D"mailto:[email protected]">[email protected]= ii.edu</a>><mailto:<a href=3D"mailto:[email protected]">listse= [email protected]</a>> Note: gmt-help will become obsolete on Sept<br> 1, 2014 - please use forum on <a href=3D"http://gmt.soest.hawaii.edu" target= =3D"_blank">gmt.soest.hawaii.edu</a><<a href=3D"http://gmt.soest.hawaii.e= du/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>><<a href=3D"ht= tp://gmt.soest.hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</= a>> instead.<br> <div class=3D""><br> Mailing list for GMT discussions of all kinds. If you are not sure you= <br> have found a bug, discuss it here first.<br> To formally report bugs or request features, please register and add New<br>= </div>Issue on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt= .soest.hawaii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"= _blank">http://gmt.soest.hawaii.edu/</a>><<a href=3D"http://gmt.soest.= hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>><br> <div class=3D"">To unsubscribe, send the message "signoff gmt-help" to<br> </div><a href=3D"mailto:[email protected]">[email protected]= </a><mailto:<a href=3D"mailto:[email protected]">[email protected]= awaii.edu</a>><mailto:<a href=3D"mailto:[email protected]">lis= [email protected]</a>><br> <div class=3D"">Note: gmt-help will become obsolete on Sept 1, 2014 - please= use forum on<br> </div><a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.ha= waii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">h= ttp://gmt.soest.hawaii.edu/</a>><<a href=3D"http://gmt.soest.hawaii.ed= u/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>> instead.<br> <div class=3D""><br> Mailing list for GMT discussions of all kinds. If you are not sure you= have found a bug, discuss it here first.<br> </div>To formally report bugs or request features, please register and add N= ew Issue on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.so= est.hawaii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_bl= ank">http://gmt.soest.hawaii.edu/</a>><<a href=3D"http://gmt.soest.haw= aii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D"mailto:lis= [email protected]">[email protected]</a><mailto:<a href=3D"m= ailto:[email protected]">[email protected]</a>><mailto= :<a href=3D"mailto:[email protected]">[email protected]</a>&= gt;<br> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on <a= href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu= </a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http://gm= t.soest.hawaii.edu/</a>><<a href=3D"http://gmt.soest.hawaii.edu/" targ= et=3D"_blank">http://gmt.soest.hawaii.edu/</a>> instead.<br> <br> Mailing list for GMT discussions of all kinds. If you are not sure you have f= ound a bug, discuss it here first. To formally report bugs or request featur= es, please register and add New Issue on <a href=3D"http://gmt.soest.hawaii.= edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a href=3D"http://gmt.soe= st.hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>><<a= href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http://gmt.soest.ha= waii.edu/</a>> To unsubscribe, send the message "signoff gmt-help" to <a h= ref=3D"mailto:[email protected]">[email protected]</a><ma= ilto:<a href=3D"mailto:[email protected]">[email protected]<= /a>><mailto:<a href=3D"mailto:[email protected]">listserv@list= s.hawaii.edu</a>> Note: gmt-help will become obsolete on Sept 1, 2014 - p= lease use forum on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank"= >gmt.soest.hawaii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target= =3D"_blank">http://gmt.soest.hawaii.edu/</a>><<a href=3D"http://gmt.so= est.hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>> inst= ead.<br> <div class=3D""><br> Mailing list for GMT discussions of all kinds. If you are not sure you= have found a bug, discuss it here first.<br> To formally report bugs or request features, please register and add New Iss= ue on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.ha= waii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">h= ttp://gmt.soest.hawaii.edu/</a>><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D"mailto:lis= [email protected]">[email protected]</a><mailto:<a href=3D"m= ailto:[email protected]">[email protected]</a>><br> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on <a= href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu= </a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http://gm= t.soest.hawaii.edu/</a>> instead.<br> <br> Mailing list for GMT discussions of all kinds. If you are not sure you= have found a bug, discuss it here first.<br> To formally report bugs or request features, please register and add New Iss= ue on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.ha= waii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">h= ttp://gmt.soest.hawaii.edu/</a>><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D"mailto:lis= [email protected]">[email protected]</a><mailto:<a href=3D"m= ailto:[email protected]">[email protected]</a>><br> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on <a= href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu= </a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http://gm= t.soest.hawaii.edu/</a>> instead.<br> <br> Mailing list for GMT discussions of all kinds. If you are not sure you= have found a bug, discuss it here first.<br> </div>To formally report bugs or request features, please register and add N= ew Issue <a href=3D"http://ongmt.soest.hawaii.edu" target=3D"_blank">ongmt.s= oest.hawaii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_b= lank">http://gmt.soest.hawaii.edu/</a>><br> <div class=3D"">To unsubscribe, send the message "signoff gmt-help" to <a hr= ef=3D"mailto:[email protected]">[email protected]</a><mai= lto:<a href=3D"mailto:[email protected]">[email protected]</= a>><br> </div>Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum= <a href=3D"http://ongmt.soest.hawaii.edu" target=3D"_blank">ongmt.soest.haw= aii.edu</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">ht= tp://gmt.soest.hawaii.edu/</a>> instead.<br> <div class=3D""><br> Mailing list for GMT discussions of all kinds. If you are not sure you have f= ound a bug, discuss it here first. To formally report bugs or request featur= es, please register and add New Issue on <a href=3D"http://gmt.soest.hawaii.= edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a href=3D"http://gmt.soe= st.hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>> To un= subscribe, send the message "signoff gmt-help" to <a href=3D"mailto:listserv= @lists.hawaii.edu">[email protected]</a><mailto:<a href=3D"mailto= :[email protected]">[email protected]</a>> Note: gmt-help= will become obsolete on Sept 1, 2014 - please use forum on <a href=3D"http:= //gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a hre= f=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii= .edu/</a>> instead.<br> </div>Mailing list for GMT discussions of all kinds. If you are not sure you= have found a bug, discuss it here first. To formally report bugs or request= features, please register and add New Issue on <a href=3D"http://gmt.soest.= hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a href=3D"http://= gmt.soest.hawaii.edu" target=3D"_blank">http://gmt.soest.hawaii.edu</a>> T= o unsubscribe, send the message "signoff gmt-help" to <a href=3D"mailto:list= [email protected]">[email protected]</a><mailto:<a href=3D"ma= ilto:[email protected]">[email protected]</a>> Note: gmt-= help will become obsolete on Sept 1, 2014 - please use forum on <a href=3D"h= ttp://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a= href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">http://gmt.soest.haw= aii.edu</a>> instead.<br> <div class=3D"HOEnZb"><div class=3D"h5"><br> Mailing list for GMT discussions of all kinds. If you are not sure you= have found a bug, discuss it here first.<br> To formally report bugs or request features, please register and add New Iss= ue on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.ha= waii.edu</a><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D"mailto:lis= [email protected]">[email protected]</a><br> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on <a= href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu= </a> instead.<br> </div></div></blockquote></div><br></div> Mailing list for GMT discussions of all kinds. If you are not sure you have= found a bug, discuss it here first. To formally report bugs or request features, please register and add New Iss= ue on <a href=3D"http://gmt.soest.hawaii.edu">gmt.soest.hawaii.edu</a> To unsubscribe, send the message "signoff gmt-help" to <a href=3D"mailto:lis= [email protected]">[email protected]</a> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on <a= href=3D"http://gmt.soest.hawaii.edu">gmt.soest.hawaii.edu</a> instead. </div></blockquote></body></html>= Mailing list for GMT discussions of all kinds. If you are not sure you have found a bug, discuss it here first. To formally report bugs or request features, please register and add New Issue on gmt.soest.hawaii.edu To unsubscribe, send the message "signoff gmt-help" to <a href=3D"mailto:[email protected]">[email protected]</a> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on gmt.soest.hawaii.edu instead. --Apple-Mail-71A492FE-4F63-4A37-B06E-F86133966786--