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Digital Topographic and Planimetric Mapping

Stesalit has developed a rich expertise in topographical and planimetric mapping. Numerous projects have been undertaken on a global scale to produce accurate digital map representations, from aerial photography or satellite imagery, of physical features, such as buildings, roads, and utilities, as required by the project.

Preparatory Data

Topographic and planimetric vector mapping is compiled at scales ranging from 1’=10’ to 1’=1,000’ with contour intervals from .5’ to 20’.

For topographic mapping the required vertical accuracy of the final mapping usually dictates the altitude at which the photography is flown. (The lower the altitude of the photography the higher the vertical accuracy of the elevation data).

For planimetric mapping the size of the features on the ground that have to be compiled usually dictates the altitude of the photography. (In urban areas features such as manholes and water meter covers are not identifiable on photography flown above 1,800’).

Stesalit utilizes both analytical instruments and softcopy workstations to compile topographic and planimetric mapping. All update mapping projects including volumetric surveys are compiled using our softcopy workstations, where the previous map data can be displayed over the new aerial photography. This improves the identification of the areas that have changed.

Digital map data can be supplied in AutoCAD, Microstation, Terramodel or ARC/INFO formats configured to any layer or level structure requested by our clients.

Feature Collection
Typical features collected at 1”=50’ scale:
  • All vegetation including landscape shrubbery and trees
  • All driveways paved and unpaved
  • All parking surfaces and paint markings
  • All structures
  • All roadways including curb and gutter
  • All hydrographic features including manholes, catch basins, valves etc.
  • All utilities such as power poles, light post, guy wire etc.
Typical features collected at 1”=100’scale
  • Roadways
  • Driveways
  • Parking Surfaces
  • All structures
  • Structures
  • Tree lines and landmark single trees
  • Major Hydrographic features
  • Major Utilities
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