To measure planimetrics a planimeter or dot planimeter is used. This rather advanced analog technology is being taken over by simple image measurement software tools like, ImageJ, Adobe Acrobat, Google Earth Pro, Gimp, Photoshop and KLONK Image Measurement which can help do this kind of work from digitalized images.
Planimetric elements in geography are those features that are independent of elevation, such as roads, building footprints, and rivers and lakes. They are represented on two-dimensional maps as they are seen from the air, or in aerial photography. These features are often digitized from orthorectified aerial photography into data layers that can be used in analysis and cartographic outputs.
- Hart, David A. (July 1, 1998). "Planimetric and Topographic Mapping Report".
- Montgomery, Glenn E.; Schuch, Harold C. (2007). GIS Data Conversion Handbook. John Wiley & Sons Inc. ISBN 9780471329831.
- Committee on Nomenclature of the American Society of Photogrammetry (1942). "Definitions of terms used in photogrammetric surveying and mapping: preliminary report". Photogrammetric Engineering. 8: 247–283.
Topographic Map. A map that presents the horizontal and vertical positions of the features represented; distinguished from a planimetric map by the addition of relief in measurable form.