Mapping Services: Photogrammetric Elevation Models

Spectrum Mapping's extensive photogrammetric equipment and experienced professionals make Digital Elevation Model (DEM) and Digital Terrain Model (DTM) collection a snap for customers seeking three-dimensional data.

The DEM/DTM provides a framework of accurately mapped points for analysis of elevation changes and modeling of ‘z’ data. A DEM/DTM is accurately collected elevation data used for contour development, terrain modeling and analysis. Spectrum collects data with a host of systems and software, we then process, translate, convert, plot and deliver our data to suit whatever application or format our client’s desire.

A DEM is a series of elevation points usually collected on a grid system. A DTM is collected using a much more extensive layout including masspoints and a series of sharp, hard and soft breaklines, which are collected along all changes in elevation such as top and bottoms of hills, streams, ditches, and embankments. The DTM is much more accurate and should be used to generate contours.

Spectrum’s professionals determine the best approach for developing either elevation and/or terrain data. When we develop DEMs and DTMs, you’ll always be assured the most accurate technique, advanced equipment and skilled professionals are working for you.


info@specmap.com