Re: Pixelated, Regional Topograpy Data
"Gregory (Greg) Brenn" <[email protected]> Mon, 11 Aug 2014 20:14:03 -0400
| Newsgroups | gmane.comp.gis.gmt.user |
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| Message-ID | <CAP5suEUg0sxipRNRsGgkZcbCBkfne-0aATrqfPGWeWScr+ULBQ@mail.gmail.com> |
--001a113a5bc69663630500638c52 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Ok awesome. 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 to 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? On Mon, Aug 11, 2014 at 4:32 PM, Becker, Joseph J. < [email protected]> wrote: > I notice the SRTM v.3 land data is now also being called "srtm plus" on > that web page. > > This is the link to the bathymetry that Joaquim is recommending=E2=80=A6 > > http://topex.ucsd.edu/WWW_html/srtm30_plus.html > > 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 f= ew > locations where multi beam data was publicly available in 2008. At most > locations the bathymetry resolution might be analogized as correct but lo= w > pass filtered at a resolution of a few arc minutes. > > -jj > > > > On Aug 11, 2014, at 2:50 PM, Joaquim Luis <[email protected]<mailto: > [email protected]>> wrote: > > Use the SRTM+ (SRTM plus). > It's the best one of its class (30 sec resolution -- sometimes true, > others a bit less true) > > Sent from my iDedo > > No dia 11/08/2014, =C3=A0s 11:41, Gregory Brenn <[email protected]<m= ailto: > [email protected]>> escreveu: > > I used SRTM, and the topography looks great. I created a nice script. > Now 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 data, such as from GEBCO? > > > On Aug 11, 2014, at 1:21 PM, Joaquim Luis <[email protected]<mailto: > [email protected]>> wrote: > > On 11/08/2014, at 09:23, "Fielding, Eric J (329A)" < > [email protected]<mailto:[email protected]>> wrote: > > The new SRTM v.3 has merged ASTER to fill voids. SRTM is better in almost > every location outside of voids. > > And it takes 9 times less disk space > > Joaquim > > > Sent from my iPadiola > > > ++Eric > > Sent from my iPhone > > On Aug 11, 2014, at 12:17, "Becker, Joseph J." < > [email protected]<mailto:[email protected]= L>> > wrote: > > 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 i= s > noisy; e.g.; a tile near the Galapagos has a few points indicating ~7,000= m > elevation on Isla Darwin. > > 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 GM= T > tools are fast so the extra computer time is negligible=E2=80=A6 > > -jj > > > On Aug 11, 2014, at 10:38 AM, JJ Becker <[email protected]= l > <mailto:[email protected]><mailto: > [email protected]>> wrote: > > 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: > > 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 > resolution you would like, > and grid. > > > 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 > > > 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 median height from a cloud of neighboring points (aka the center of t= he > down sampled pixel, the average location of the cloud, the location whose > height happens to be the median, etc=E2=80=A6) > > -jj > > On Aug 9, 2014, at 3:13 PM, Gregory (Greg) Brenn <[email protected] > <mailto:[email protected]><mailto:[email protected]>> wrote: > > Ok, > > That's great. I downloaded an unzipped .hgt files, so what do you think > would be the best way to convert the .hgt files (I have 4 that I want to > convert) into .grd files, then stich those files together? Could I use > xyz2grd and then use grdpaste? > > Thanks a lot for your help. > Greg > > > On Sat, Aug 9, 2014 at 2:44 PM, Fielding, Eric J (329A) < > [email protected]<mailto:[email protected]><mailto: > [email protected]>> 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_globa= l > _90m_and_united_states_30m_elevation_data_now_availab/< > http://www.opentopography.org/index.php/news/detail/srtm_version_30_globa= l_90m_and_united_states_30m_elevation_data_now_availab/>). > The GeoTIFF files > are easy to convert to GMT .grd files with GDAL. > > ++Eric Fielding > > > -----Original Message----- > From: "Walter Smith (HF)" <[email protected]<mailto: > [email protected]><mailto:[email protected]>> > Reply-To: World-Wide GMT Usage and Help Mailing List > <[email protected]<mailto:[email protected]><mailto: > [email protected]>> > Date: Saturday, August 9, 2014 11:04 AM > To: "[email protected]<mailto:[email protected]><mailto: > [email protected]>" <[email protected]<mailto: > [email protected]><mailto:[email protected]>> > Subject: Re: [GMT-HELP] Pixelated, Regional Topograpy Data > > =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. > > There is higher resolution topography than ETOPO1, such as SRTM3. You=C2= =B9ll > have to search around and you may have to assemble it from a few tiles > that you may have to download separately. > > Walter > > On Aug 9, 2014, at 1:50 PM, Gregory (Greg) Brenn <[email protected] > <mailto:[email protected]><mailto:[email protected]>> > wrote: > > Hello, > > 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: > > #!/bin/bash > > clear > > xyz2grd COSTARIC-6565.xyz -Gcostarica.grd -R-87/-84/9/11 -I2m -V > > grdimage costarica.grd -JM12 -K -Cmy-topo.cpt -R-87/-84/9/11 >> map.ps< > http://map.ps/> > > pscoast -V -O -K -JM -R -W1 >> mappy.ps<http://mappy.ps/> > > 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/> > > > > 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. > > 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. > > 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? > > > > Thanks, > > Greg > > 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.hawaii.edu/> To unsubscribe, send the message "signoff > gmt-help" > to [email protected]<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. > > 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.hawaii.edu/> > To unsubscribe, send the message "signoff gmt-help" to > [email protected]<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. > > 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.hawaii.edu/> > To unsubscribe, send the message "signoff gmt-help" to > [email protected]<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. > > 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 reque= st > features, 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 message "signoff gmt-help" to > [email protected]<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. > > 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/> > To unsubscribe, send the message "signoff gmt-help" to > [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/> 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<http://gmt.soest.hawaii.edu/> > To unsubscribe, send the message "signoff gmt-help" to > [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/> 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 ongmt.soest.hawaii.edu<http://gmt.soest.hawaii.edu/> > To unsubscribe, send the message "signoff gmt-help" to > [email protected]<mailto:[email protected]> > Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum > ongmt.soest.hawaii.edu<http://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 reque= st > features, 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 [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/> 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 reque= st > features, 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 [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> 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. > 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. --001a113a5bc69663630500638c52 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">Ok awesome.<div><br></div><div>Now I am hoping to take ASC= II 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>=C2=A0,= but I can't seem to figure out how to save it as an xyz file, which I = could then convert to a .grd file in GMT. =C2=A0I 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, Jo= seph J. <span dir=3D"ltr"><<a href=3D"mailto:[email protected]= vy.mil" target=3D"_blank">[email protected]</a>></span> = wrote:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex">I notice the SRTM v.3 land data is now also = being 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"_blan= k">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 resolutio= n, the bathymetry has that resolution only at those relatively few location= s where multi beam data was publicly available in 2008. At most locations t= he bathymetry resolution might be analogized as correct but low pass filter= ed 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@GMA= IL.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, ot= hers 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"ma= ilto:[email protected]">[email protected]</a>>> escreveu:<b= r> <div class=3D""><br> I used SRTM, and the topography looks great. =C2=A0I created a nice script.= =C2=A0Now I want to add bathymetry data to the map that I overlaid earthqu= akes with. =C2=A0Do you have any recommendations for where to get high-qual= ity bathymetry data, such as from GEBCO?<br> <br> <br> </div>On Aug 11, 2014, at 1:21 PM, Joaquim Luis <<a href=3D"mailto:jmflu= [email protected]">[email protected]</a><mailto:<a href=3D"mailto:jmfluis@GMA= IL.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:[email protected]">[email protected]</a><m= ailto:<a href=3D"mailto:[email protected]">[email protected]= ASA.GOV</a>>> wrote:<br> <br> The new SRTM v.3 has merged ASTER to fill voids. SRTM is better in almost e= very 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.&qu= ot; <<a href=3D"mailto:[email protected]">Joseph.Becker.= [email protected]</a><mailto:<a href=3D"mailto:Joseph.Becker.ctr@NRLSS= C.NAVY.MIL">[email protected]</a>>> wrote:<br> <br> I forgot to mention that we now combine the SRTM land data with the ASTER d= ata 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 ele= vation on Isla Darwin.<br> <br> We take all the land data we can get easily and block median it together fo= r 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<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]= .mil</a><mailto:<a href=3D"mailto:[email protected]">jos= [email protected]</a>><mailto:<a href=3D"mailto:joseph.b= [email protected]">[email protected]</a>>> wr= ote:<br> <br> I make the SRTM30_PLUS file(s) that were mention. If you=E2=80=99d like to = make 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 resolut= ion 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$grd =C2=A0-R$minX/$maxX/$minY/$maxY -I$resolution -V<br> <br> <br> The block median options can be used to handle the possibly troubling issue= s arising from the question of what location to pick when selecting the med= ian 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 = happens 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><mai= lto:<a href=3D"mailto:[email protected]">[email protected]</a>>= ;<mailto:<a href=3D"mailto:[email protected]">[email protected]= U</a>>> wrote:<br> <br> Ok,<br> <br> That's great. =C2=A0I downloaded an unzipped .hgt files, so what do you= think would be the best way to convert the .hgt files (I have 4 that I wan= t to convert) into .grd files, then stich those files together? =C2=A0Could= I use xyz2grd 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 (329= A) <<a href=3D"mailto:[email protected]">eric.j.fielding@jpl.= nasa.gov</a><mailto:<a href=3D"mailto:[email protected]">eric= [email protected]</a>><mailto:<a href=3D"mailto:eric.j.fieldin= [email protected]">[email protected]</a>>> wrote:<br> Yes, as Walter mentioned, the SRTM 3-arcsecond (~90 m) digital topography<b= r> is available for most of the Earth (up to 60 degrees N & S latitudes), = and<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_versio= n_30_global _90m_and_united_states_30m_elevation_data_now_availab/" target=3D"_blank">h= ttp://www.opentopography.org/index.php/news/detail/srtm_version_30_global<b= r> _90m_and_united_states_30m_elevation_data_now_availab/</a><<a href=3D"ht= tp://www.opentopography.org/index.php/news/detail/srtm_version_30_global_90= m_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 fil= es<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 =C2=A0Smith =C2=A0(HF)" <<= a href=3D"mailto:[email protected]">[email protected]</a><= mailto:<a href=3D"mailto:[email protected]">[email protected]= </a>><mailto:<a href=3D"mailto:[email protected]">walter.hf.sm= [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-= [email protected]</a><mailto:<a href=3D"mailto:[email protected]= .EDU">[email protected]</a>><mailto:<a href=3D"mailto:GMT-HEL= [email protected]">[email protected]</a>>><br> Date: Saturday, August 9, 2014 11:04 AM<br> </div><div class=3D"">To: "<a href=3D"mailto:[email protected]= ">[email protected]</a><mailto:<a href=3D"mailto:GMT-HELP@LISTS.= HAWAII.EDU">[email protected]</a>><mailto:<a href=3D"mailto:G= [email protected]">[email protected]</a>>" <<a hr= ef=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]">GMT-HELP@LI= STS.HAWAII.EDU</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=B9= ll<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"mailt= o:[email protected]">[email protected]</a><mailto:<a href=3D"m= ailto:[email protected]">[email protected]</a>><mailto:<a h= ref=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. =C2=A0Here is my Script:<b= r> <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 hr= ef=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 href=3D"http://map.ps" target=3D"_blank">map.ps</a><<a href=3D"h= ttp://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"htt= p://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. =C2=A0I 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. =C2=A0Also, 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.s= oest.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>> To unsu= bscribe, 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]= waii.edu</a>><mailto:<a href=3D"mailto:[email protected]">lis= [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" targe= t=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.ed= u/</a>> instead.<br> <div class=3D""><br> Mailing list for GMT discussions of all kinds. =C2=A0If you are not sure yo= u<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">gm= t.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.s= oest.hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>><br= > <div class=3D"">To unsubscribe, send the message "signoff gmt-help&quo= t; to<br> </div><a href=3D"mailto:[email protected]">[email protected]= u</a><mailto:<a href=3D"mailto:[email protected]">listserv@lists= .hawaii.edu</a>><mailto:<a href=3D"mailto:[email protected]">= [email protected]</a>><br> <div class=3D"">Note: gmt-help will become obsolete on Sept 1, 2014 - pleas= e use forum on<br> </div><a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.h= awaii.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>> instead.<br> <div class=3D""><br> Mailing list for GMT discussions of all kinds. =C2=A0If you are not sure yo= u have found a bug, discuss it here first.<br> </div>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>><<a href=3D"http://gmt.soest= .hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D= "mailto:[email protected]">[email protected]</a><mailto:= <a href=3D"mailto:[email protected]">[email protected]</a>&= gt;<mailto:<a href=3D"mailto:[email protected]">[email protected]= awaii.edu</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.e= du</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>> 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. To formally report bugs or request fea= tures, please register and add New Issue on <a href=3D"http://gmt.soest.haw= aii.edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a href=3D"http://gm= t.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.s= oest.hawaii.edu/</a>> To unsubscribe, send the message "signoff gmt= -help" to <a href=3D"mailto:[email protected]">listserv@lists.= hawaii.edu</a><mailto:<a href=3D"mailto:[email protected]">lists= [email protected]</a>><mailto:<a href=3D"mailto:[email protected]= aii.edu">[email protected]</a>> Note: gmt-help will become obsol= ete on Sept 1, 2014 - please use forum on <a href=3D"http://gmt.soest.hawai= i.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>>&l= t;<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http://gmt.soe= st.hawaii.edu/</a>> instead.<br> <div class=3D""><br> Mailing list for GMT discussions of all kinds. =C2=A0If you are not sure yo= u have found a bug, discuss it here first.<br> To formally report bugs or request features, please register and add New Is= sue 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>><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D= "mailto:[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.e= du</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http:/= /gmt.soest.hawaii.edu/</a>> instead.<br> <br> Mailing list for GMT discussions of all kinds. =C2=A0If you are not sure yo= u have found a bug, discuss it here first.<br> To formally report bugs or request features, please register and add New Is= sue 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>><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D= "mailto:[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.e= du</a><<a href=3D"http://gmt.soest.hawaii.edu/" target=3D"_blank">http:/= /gmt.soest.hawaii.edu/</a>> instead.<br> <br> Mailing list for GMT discussions of all kinds. =C2=A0If you are not sure yo= u have found a bug, discuss it here first.<br> </div>To formally report bugs or request features, please register and add = New Issue <a href=3D"http://ongmt.soest.hawaii.edu" target=3D"_blank">ongmt= .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&quo= t; to <a href=3D"mailto:[email protected]">[email protected]= u</a><mailto:<a href=3D"mailto:[email protected]">listserv@lists= .hawaii.edu</a>><br> </div>Note: gmt-help will become obsolete on Sept 1, 2014 - please use foru= m <a href=3D"http://ongmt.soest.hawaii.edu" target=3D"_blank">ongmt.soest.h= awaii.edu</a><<a href=3D"http://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 have= found a bug, discuss it here first. To formally report bugs or request fea= tures, please register and add New Issue on <a href=3D"http://gmt.soest.haw= aii.edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a href=3D"http://gm= t.soest.hawaii.edu/" target=3D"_blank">http://gmt.soest.hawaii.edu/</a>>= To unsubscribe, send the message "signoff gmt-help" to <a href= =3D"mailto:[email protected]">[email protected]</a><mail= to:<a href=3D"mailto:[email protected]">[email protected]</= a>> Note: gmt-help will become obsolete on Sept 1, 2014 - please use for= um on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.h= awaii.edu</a><<a href=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 yo= u have found a bug, discuss it here first. To formally report bugs or reque= st features, please register and add New Issue on <a href=3D"http://gmt.soe= st.hawaii.edu" target=3D"_blank">gmt.soest.hawaii.edu</a><<a href=3D"htt= p://gmt.soest.hawaii.edu" target=3D"_blank">http://gmt.soest.hawaii.edu</a>= > To unsubscribe, send the message "signoff gmt-help" to <a hr= ef=3D"mailto:[email protected]">[email protected]</a><ma= ilto:<a href=3D"mailto:[email protected]">[email protected]= </a>> Note: gmt-help will become obsolete on Sept 1, 2014 - please use f= orum 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>> instead.<br> <div class=3D"HOEnZb"><div class=3D"h5"><br> Mailing list for GMT discussions of all kinds. =C2=A0If you are not sure yo= u have found a bug, discuss it here first.<br> To formally report bugs or request features, please register and add New Is= sue on <a href=3D"http://gmt.soest.hawaii.edu" target=3D"_blank">gmt.soest.= hawaii.edu</a><br> To unsubscribe, send the message "signoff gmt-help" to <a href=3D= "mailto:[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.e= du</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 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. --001a113a5bc69663630500638c52--