O'Reilly logo

Mastering QGIS by GISP Dr. John Van Hoesen, GISP Dr. Richard Smith Jr., GISP Kurt Menke, Dr. Luigi Pirelli

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Defining coordinate reference systems

QGIS supports hundreds of coordinate reference systems for data display and analysis. In some cases, however, the supported CRS may not suit your exact needs. QGIS provides the functionality to create custom CRS using the Custom Coordinate Reference System Definition tool that can be found by navigating to Settings | Custom CRS.

In QGIS, a CRS is defined using the Proj.4 definition format. We must understand the Proj.4 definition format before we can define a new or modify an existing CRS; therefore, in the first part of this section, we will discuss the basics of Proj.4, and in the second part, we will walk you through an example to create a custom CRS.

Note

Proj.4 is another Open Source Geospatial Foundation ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required