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Digital Aerial Maps
Digital aerial maps are computerized maps that have been deduced from aerial photographs that have been taken perpendicular to the surface. The photographs distortion has been eliminated and the orientation is established. They can be supplied as colour and colour-infrared as well as black and white.
Different from topographic maps the objects are not generalized that is they all have the same level of detail. The position of an object has - on the ground - about the same precision as in a 1:1000 scale. Depending on the evaluation software different selections out of the aerial map can be shown or plotted in individual scales.
Which advantages have digital aerial maps?
Digital aerial maps ease and complete the work with geographic data especially in GIS projects. They enhance "regular" methods of mapping, geodetic measurement and photogrammetry.
Advantages are
- high accuracy and recency as well as high density of geographic data
- fast and precise information on coordinates and spacial size of an object as well as on distances
- the possibility to merge with individual vector data just as required
- reduction of outdoor activities that is gaining time for more quality in analysis and conclusions
Where can digital aerial maps be used?
Because it is possible to merge an areal map - giving the actual state of an area - with different vectorial data a multifolde of applications emerge. Therefore the digital aerial map is an ideal basis for :
- planning purposes of all kinds
- data collection with geographic references in:
- public agencies
- engineering companys
- industry
- traffic and transport
- cartographic publications
- federations
- agriculture
- army
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This digital aerial map shows a section of the City Neubrandenburg.
Basis are 6 georeferenced and postprocessed aerial colour photographs of scale 1 : 10000
Examples are
- environmental contaminations
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