2020年5月12日 · I'm new to GIS and when I was looking in my data directory I saw .prj-file. What is that and how is it useful?

We use shapefiles for data exchange. I've looked at the .prj files: different programs produce different prj files. Is there a standard for how the parameters must be specified in a prj file? As fa...

The shapefile should have a .prj file which defines the projection. You can use it together with one of the following 3 options to get either the proj4 string, WKT definition or EPSG code.

2017年11月5日 · In my experience, inexperienced users/users from a different discipline are generally when I receive a shapefile lacking a *.prj. Often, I ask for the .prj and .dbf, .shx files explicitly, or that I expect ~7 files in a "shapefile".

2018年2月8日 · I have four files: .prj, .qpj, .shp and .shx. They are properly read by Luciad (it seems that only .shp and .prj are necessary for that). Now I would like to import shapes into QGIS taking into a...

2021年7月22日 · So you have to "scale" your geometry not project.. The .prj file only contain the definition of the coordinate system what you want implement is a "transformation"

2016年10月17日 · .prj file is a non-mandatory file for group of files generally called as Shapefile. Mandatory files are: .shp, .shx and .dbf Citing wikipedia: .prj — projection format; the coordinate system and projection information, a plain text file describing the projection using well-known text format In QGIS you can create .prj file through menu: Vector - Data Management Tools - …

2018年1月31日 · The file format was never intended for what it is used widely today. Therefore you have several issues when switching programs. If you stay within QGIS you can just set correct crs in the properties and export the layer to a new file. QGIS writes a .prj in its style and also a .qpj . You can´t really tell in which program the .prj file was ...

2017年6月20日 · I can say a qualified 'yes', ArcGIS does read PRJ files for the formats that I have used. If you use define projection an AUX file will be generated not a PRJ but if one exists, in my experience, it will be read if ArcGIS can read and interpret the information.

The best reference I know to help you understand a .prj file is which explains the notation and should help you decode them. Other resources include which will allow you to look up and download .prj files for various projections. Another useful site is where you can convert .prj files to standard epsg codes which other software can understand. In your specific example above it's …