DTM – Digital Terrain Model

ORI– Orthorectified Radar Imagery

• Height model of surface detected – gives height of buildings, forests, hedges etc
• 5m Post (essentially 1 point every 5m resolution)
• 0.5 RSME
• Processing to flatten and smooth lakes, airports, roads etc.  Also prevented saddles in drainage systems
• Ideal for 3D Models, Draping Aerial Photography, Orthorectification etc

• Height model of bare earth surface – so does not show hedges, trees, buildings etc
• 5m or 10m Post (essentially 5m or 10m resolution)
• 0.7 RSME
• Processing to flatten and smooth lakes, airports, roads etc.  Also prevented saddles in drainage systems
• Ideal for flood modelling, Contour mapping etc

• Appears like black and white aerial photography at a glance
• 1.25m resolution
• Does not vary in colour of surfaces – just roughness and moisture content. Forests are quite rough so may appear brighter than a road which is relatively smooth
• Excellent for viewing linear features (roads, rivers, hedges etc)
• No clouds as these are transparent for radar

5m Resolution

5/10m Resolution

1.25m Resolution