If there is no solution to automatically "patch" this issue, meanwhile we could edit a wiki page describing a solution (like passing a proj.4 chain) to the location's creation.Īt this stage, I'm not sure what the solution would be. Ok bu sooner or later, users may have to manage data in this "projection" system, and they might be puzzled (angry) to see it does not work despite a proper location definition via the epsg code.
#Proj info of pennsylvania grass gis code
Several official administrations forbid its use.Īs discussed during the code sprint, the issue is because of the very weird nature of this "projection" system This program uses the projection definition and parameters which are stored in the PROJINFO and PROJUNITS files in the PERMANENT mapset directory for every GRASS location. commonly referred to as GRASS GIS, is a Geographic Information System (GIS). UC117 Agronomy Facts 46: Multiflora Rose Management in Grass Pastures (An.
The format is identical to the WIND files created by g. PROJINFO contains the locations projection information PROJUNITS contains the locations map units definition DEFAULTWIND the default region (WINDow file). The most reasonable conclusion, however, was to not use this system at all because of it's weird nature. In GRASS GIS the v.proj module is provided to reproject vector maps, transferring topology and attributes as well as node coordinates. Educational activity that uses GIS and GPS technology to develop a community. Project Title: Pennsylvania Small Farm Environmental Stewardship Program. NOTE: see GRASS GIS 8 example above which is much easier Note: For Python3 support you need to use at least GRASS GIS 7.8. LiDAR elevation data for the entire state. In the discussions, one idea that came up was to provide alternative datum transformation parameters for this system, one on the sphere and one on the wgs84 ellipsoid. The Program is conducting an unprecedented project to collect and process high-resolution. The proj.4 definition of this projection system seems to be somewhat of a hack. AFAIU, in GRASS, we have not foreseen the option to declare one datum, but using a different ellipsoid than the one normally linked to that datum. It uses the WGS 84 datum (which normally implies the WGS 84 ellipsoid), but actually develops the coordinates on a sphere. Relative to WGS 84 / World Mercator (CRS code 3395) errors of 0.7 percent in scale and differences in northing of up to 43km in the map (equivalent to 21km on the ground) may arise." "Uses spherical development of ellipsoidal coordinates. As discussed during the code sprint, the issue is because of the very weird nature of this "projection" system:
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