Well known text: a way to encode datum and projection information.

At one fairly recent point in time there were multiple WKT variants which were not compatible, but that seems to be less of a problem now.

MICRODEM is moving to using WKT to define map projections, currently including:

The file should have a .PRJ or .WKT extension

The following projections should currently be supported; if you have problems with them, send us the WKT PRJ file you are trying to use as there is still some variability in the coding.

To change to one of these projections:

If you would to see other projects, contact us.

OGC WKT Projection files and Projection Codes

Last revision  6/30/2022