Sure, elevation data is available from other providers, but no one is going to go to the ends of the earth like eMap to make sure clients get exactly what they need, and at the best price. eMap leverages partnerships with all of the leading elevation data providers to craft custom solutions for each project, selecting the best sensor and production options to meet the needs of every customer, every time.
Available Sensors
Elevation data is widely used across geographic regions, vertical markets and software platforms. From watershed management to seismic processing and volumetric analysis, accurate elevation data is probably the world’s most valuable and highly desired geospatial data.
| WorldView-2 | GeoEye-1 | WorldView-1 | IKONOS | Intermap | TerraSAR-X | Cartosat-1 | |
| Sensor Details | 50-cm 8-band | 50-cm 4-band | 50-cm panchromatic | 80-cm 4-band | 5m aerial IFSAR | 10m satellite IFSAR | 2.5-m panchromatic |
| Key Capabilities | • Highest res • Best accuracy • Best color |
• Highest res • Best accuracy |
• Highest res • Best accuracy • Best capacity |
• Best capacity • Better value |
• Quickest delivery • Smallest min order |
• Can penetrate clouds | • Best archive • Best value |
| Post Spacing (meters) | 1 | 1 | 1 | 2 | 5 | 10 | 5 |
| Vertical Accuracy (RMSE) | < 1 | < 1 | < 1 | < 2 | 1 | 5-10 | 5-10 |
| Horizontal Accuracy (RMSE) | < 4 | < 4 | < 4 | < 2 | 2 | 5-10 | 5-10 |
Value-Add Processing Options
- Digital Surface Model (DSM) –a representation of the earth’s surface that includes all objects on it (e.g. man-made features, vegetation, etc.).
- Digital Terrain Model (DTM) – a representation of the earth’s bare ground surface without any objects on it.
- Topographic Breaklines – a line in an elevation model that represents a distinct interruption in the slope of a surface, such as a ridge, road, or stream.
- Topographic Mapping (Contour Lines) – a Map that shows relief through differences in lines where each line represents an equal value of elevation along a curve.
- Planimetric Mapping – a map indicating only the horizontal positions of features, without regard to elevation.
- Volumetric Calculations – a measurement of the total volume of a three dimensional feature using a base elevation surface and a surface representing the volume being measured.
- Viewshed (Line of Sight) Analysis – a map derived from an elevation model that determines which areas are visible from a specific location.
Why Choose eMap?
Our no-frills attitude ensures that customers get world-class service and high-quality products without unnecessary software, long timelines, or sales pitches. With over 80 years of combined geospatial experience, eMap stands ready to deliver the maximum amount value for the best price, using every resource available.
Request a quote for elevation data and/or value-added production services.
