Coordinate Systems
This page provides links to information about how map coordinates are used.
Geographic Coordinates: Latitude and Longitude
Describes the system of latitude and longitude that is used globally, with many examples of
how the coordinates can be written.
Projected Coordinates
Describes how coordinates in a meter-based square grid can be used in a limited region of the world.
In particular, the UTM system and its MGRS notation are described in detail.
Classes for Coordinate Reference Systems
Describes the classes in Carmenta Engine that are needed to make a Coordinate Reference System.
CRS Authorities
Describes the authorities, like EPSG, that assign unique code numbers to Coordinate Reference Systems.
Axis order and axis names
Describes how to find axis order and axis names.
Calculating with coordinates
Describes how to calculate with coordinates and how large errors you can expect.
When are things reprojected?
Describes where, in an operator chain, rectangles and features are reprojected.
Letting a DataSet read its CRS from data files
Describes how you make Carmenta Engine read Coordinate Reference System information from geodata files.
Types of vertical coordinates
Describes how to interpret the z-coordinate in position, and how to transform between
different kinds of height.