Volume XL-2/W1
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-2/W1, 35-40, 2013
https://doi.org/10.5194/isprsarchives-XL-2-W1-35-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-2/W1, 35-40, 2013
https://doi.org/10.5194/isprsarchives-XL-2-W1-35-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

  13 May 2013

13 May 2013

FIRST, DO NO HARM: ELIMINATING SYSTEMATIC ERROR IN ANALYTICAL RESULTS OF GIS APPLICATIONS

N. Chrisman1 and J.-F. Girres2 N. Chrisman and J.-F. Girres
  • 1Geospatial Sciences, RMIT University, Melbourne, Australia
  • 2Université Paris-Est, IGN/SR, COGIT, 73 avenue de Paris, 94160 Saint-Mandé, France

Keywords: Systematic error, map projections, scale error, area, perimeter, correction of error

Abstract. GIS applications compute analytical results comprised of geometric measures such as perimeter, distance between objects, and area. Usual practice operates in Cartesian coordinates on map projections, inducing a systematic variation due to scale error. The magnitude of these errors is easy to foresee, though rarely corrected in analytical reports. Solutions to this error can be implemented though a number of alternative procedures.