Re: grass-user Digest, Vol 140, Issue 28
Micha Silver <[email protected]>
| Newsgroups | gmane.comp.gis.grass.user |
|---|---|
| Message-ID | <[email protected]> |
On 12/19/2017 02:29 AM, Shane Carey wrote: Hi, Unfortunately I could not get that to work. Any other suggestions? Cloud processing perhaps? What happens? With 5 sq.m. pixels (that is your region setting?) and a DEM of 100,000 sq.km as you mentioned, then the DEM must contain around 100x10^9 sq.m or around 4x10^9 pixels. (4 billion pixels). That's a lot... (You probably already did this calculation). So your DEM raster is probably some 15 GB ? You'll need plenty of RAM. On Luan 18 Noll 2017 at 20:17, Shane Carey <[email protected] > wrote: Super, thanks On Mon, Dec 18, 2017 at 8:00 PM, <[email protected] > wrote: Send grass-user mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit https://lists.osgeo.org/mailman/listinfo/grass-user or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of grass-user digest..." Today's Topics: 1. Re: Contours (Rich Shepard) ---------------------------------------------------------------------- Message: 1 Date: Mon, 18 Dec 2017 09:38:16 -0800 (PST) From: Rich Shepard <[email protected] > To: grass-user grass-user <[email protected] > Subject: Re: [GRASS-user] Contours Message-ID: <[email protected] > Content-Type: text/plain; charset=US-ASCII; format=flowed On Mon, 18 Dec 2017, Shane Carey wrote: > I have a large DTM (5m cell size) and it covers an area of 100,000km2. I > need to create contours every 10meters in the dataset. If I tile the > dataset and contour each tile, the data, the contours act funny at the > edges, hence the need to process the area as one area. Is grass capable of > doing this? Shane, Yes. As long as you have sufficient memory and drive space. You can always set the environment variable in ~/.bash_profile: export=GRASS_VECTOR_LOWMEM=1 which will use available memory and not crash, while running more slowly. If I'm wrong I'm sure we'll both read about it. :-) HTH, Rich ------------------------------ Subject: Digest Footer _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user ------------------------------ End of grass-user Digest, Vol 140, Issue 28 ******************************************* -- Le gach dea ghui, Shane Carey GIS and Data Solutions Consultant -- Le gach dea ghui, Shane Carey GIS and Data Solutions Consultant _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user -- Micha Silver Ben Gurion Univ. Sde Boker, Remote Sensing Lab cell: +972-523-665918 _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user