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= Projections and Datum Transformations = | = Projections and Datum Transformations = | ||
== Brief introduction to projections and spatial transformations in GRASS == | |||
A GRASS location is referenced with a single projection and coordinate system (or unreferenced as XY location). When creating a new location from an existing raster or vector map using the tools available from the startup screen or the map import commands, projection and coordinate system are defined. To change the projection of maps, a new location has to be created and the desired maps have to be reprojected into it from the source location as explained below. | |||
Read on in {{cmd|projectionintro}}... | |||
= Support Material = | |||
* Ready to use .PRJ files (in the usual WKT format) as used by recent versions of ESRI ArcView: [http://esri-germany.de/downloads/software/Koordinatensysteme.zip download] | |||
http://www.alectoria.at/content/view/17/1/ | = See also = | ||
* In English: | |||
** [http://www.epsg.org/Geodetic.html EPSG Geodetic Parameter Dataset] | |||
** [http://www.asprs.org/resources/grids/ ASPRS Grids and Datum] | |||
** [http://www.remotesensing.org/geotiff/proj_list/ Projections Transform List (PROJ4)] | |||
** [http://www.mapref.org/ MapRef - The Collection of Map Projections and Reference Systems for Europe] | |||
** [http://www.crs-geo.eu Information and Service System for European Coordinate Reference Systems - CRS] | |||
* In German language: | |||
** http://support.esri-germany.de/files/support/KoordinatensystemeInDeutschland.pdf | |||
** http://support.esri-germany.de/files/support/KoordinatensystemeNachbarnDeutschlands.pdf | |||
** http://support.esri-germany.de/files/support/KoordinatensystemeWeltweit.pdf | |||
** [http://www.alectoria.at/content/view/17/1/ Projection parameters of Austria] | |||
== Google Map Projection == | |||
* http://www.sharpgis.net/2007/07/27/TheMicrosoftLiveMapsAndGoogleMapsProjection.aspx | |||
* http://cfis.savagexi.com/articles/2006/05/03/google-maps-deconstructed | |||
[[Category: FAQ]] | |||
Revision as of 19:56, 17 March 2011
Projections and Datum Transformations
Brief introduction to projections and spatial transformations in GRASS
A GRASS location is referenced with a single projection and coordinate system (or unreferenced as XY location). When creating a new location from an existing raster or vector map using the tools available from the startup screen or the map import commands, projection and coordinate system are defined. To change the projection of maps, a new location has to be created and the desired maps have to be reprojected into it from the source location as explained below.
Read on in projectionintro...
Support Material
- Ready to use .PRJ files (in the usual WKT format) as used by recent versions of ESRI ArcView: download
See also
- In English:
- In German language: