GRASS FAQ

From GRASS-Wiki
Revision as of 06:53, 19 May 2006 by Dassau (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

This pages contains a growing list of Frequently Asked Questions (FAQs). Feel free to add text, "Edit" button for that.

Usage

Data

  • Can I map data from an arbitrary database model to work with GRASS without having to restructure or create a new database?

Technical

Installation

GRASS 6 compilation problems

  • Can't find a library even after I've built and installed it: Make sure that /usr/local/lib (or where you installed it) is listed in your /etc/ld.so.conf file and (as root) run /sbin/ldconfig.
  • grass 5.7 compilation problems: - GRASS57 Compilation
  • grass 5.3, 5.4 compilation problems: - GRASS53 Compilation
  • How do I install grass in windows 2000: - WinGRASS Installation

GRASS and Cygwin

  • How do I find the Cygwin packages to install? - Cygwin Packages
  • Can't find pq.dll: Make sure you installed the PostgreSQL package in the Cygwin [installer].
  • Can't find pq.dll : try copy cygpq.dll to pq.dll

Errors

  • In a Latitude-Longitude location I'm getting the error Illegal latitude for North when importing an unprojected raster image: Unprojected images are given a resolution of 1 pixel per line, and so any image with a height of more than 90 pixels will try and write data to an impossible latitude.

Solution: import the image into a simple XY location and georeference the image with either r.region (if bounds are simple and known) or i.points and i.rectify. An automated alternative to r.region is to create a "World File" to be used by r.in.gdal. See the GeoTIFF format help page at [[1]].