To Ensure Spatial Acuracy In Your GIS Data Set
A Multi-Platform Solution
From inventory management to underground utility locating, accurate geospatial data has never been more important. CompassAATM and CompassTATM are GIS tools to ensure the accuracy of field data, as well as to verify the accuracy of any pre-existing geospatial datasets. CompassAATM and CompassTATM promotes excellence and agility for your independent QA/QC.
Data Validation: Independent Verification & Validation Testing
CompassData can evaluate the precision and accuracy of an existing GIS data set by taking measurements in the field and recording attribute data. Data Verification, also known as “ground truth,” is the best way to certify that your existing data set is complete and accurate. We can take your existing GIS data and design a test to provide Independent V&V, verification, and validation of the quality including:
- Spatial accuracy
- Feature/attribute accuracy
- Photogrammetric accuracy
- Route accuracy for GNSS navigation applications
- Organizational accuracy (i.e. naming conventions, domains, duplicate values, topologies and networks)
- Geometric accuracy (i.e.tiny polygons and sliver polygons)
For over 20 years, CompassData has performed custom GCP collection for clients in the geospatial profession and archived those points in a database for commercial sale to other end users. Among their many applications, the GCPs are used extensively to verify the accuracy of geospatial data. CompassData also utilizes our CompassAA and CompassTA map accuracy software to verify and validate the spatial accuracy of aerial and satellite data.
NGS Accuracy Validation:
CompassData uses National Geodetic Survey monuments (and their international counterparts), re-surveying monuments on a regular basis to ensure our equipment is calibrated correctly and that the QA/QC for our clients is accurate.
“True cell tower location is 1.36 meters off.”
Because CompassData owns more Ground Control Points (GCPs) than any other commercial outlet in the world, we have a unique master database to help facilitate our independent QA/QC.
These Commerical Sensor Operator use CompassData Control for their QA/QC:
- Satellite: GeoEye-1, WorldView-1, WorldView-2, IKONOS, QuickBird , SPOT
- Aerial: Z/I DMC, ADS – 40 series, Applanix , Vexcel UltraCam , DigiCam
- LiDAR: Airborne Hydrography, AB, Leica Geosystems, Optech, RIEGL, TopoSystems GmbH