PRJ file: How to open? The best software for opening prj files

Files with prj extension can generally be found as project. Used in many programs to save work in progress.

File extension prj is traditionally used for files that contain projects. Projects are works in progress, these can be documents, 3D graphics, music, or pretty much anything that takes some time to create.

Projects contain settings, positions of saved windows, development notes and other raw data that wont be present in the final file.

When a project is finished, it is usually saved or exported to regular format of the program, or some other exchangeable format.

These .prj files are used in many programs, however they are almost always complete different formats and as such, can only be opened in the original application.

Use the program from which the *.prj file originated to open and work with it.

Generally speaking, projects can usually be exported to some sort of output / exchange format dependingon the original program. Audio projects export to audio files, video projects to video files etc.

File extension prj is also associated with ArcView Shapefile projection format; the coordinate system and projection information, a plain text file describing the projection using text format.

The projection information contained in the .prj file is critical in order to understand the data contained in the .shp file correctly. Although it is technically optional, it is most often provided, as it is not necessarily possible to guess the projection of any given points. Some typical information contained in the .prj file is:

Geographic coordinate system
Datum
Spheroid
Prime meridian
Map projection
Units used

The ESRI Shapefile is a popular geospatial vector data format for geographic information systems software. It is developed and regulated by ESRI as a (mostly) open specification for data interoperability among ESRI and other software products. A shapefile commonly refers to a collection of files with .shp, .shx, .dbf, and other extensions on a common prefix name (e.g., "lakes.*"). The actual shapefile relates specifically to files with the ".shp" extension, however this file alone is incomplete for distribution, as the other supporting files are required.

Shapefiles spatially describe geometries: points, polylines, and polygons. These, for example, could represent water wells, rivers, and lakes, respectively. Each item may also have attributes, that describe the items, such as the name or temperature.

ESRI ArcView should be able to work with this type of .prj files.

Possibly can be exported and saved in ArcView along with with other GIS data.

PRJ

What is prj file?

How to open prj file?

How to convert prj file?

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Associated software actions with the prj file

Software applications that can open prj files:

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Software applications that handle other tasks involving prj files:

ArcView Shapefile projections definition file