Spot Image JP - Telecoms

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Telecoms

With the recent development of cellular telephone networks in numerous countries, the telecommunications sector has become one of the biggest users of geographic information, with stringent requirements on scale and data relevance.

You need

To set up the infrastructures for new networks, size new town or countrywide networks, or complement current networks. You wish to simulate radio wave propagation through radio coverage maps.





Classification of buildings by height (red : maximum height) - Processing Geoimage

We offer

A range of ready-to-use databases containing satellite, aerial and map data at different scales:

country or region
peri-urban
city centre

Each database contains:

a satellite imagemap providing a precise description of the territory and terrain features,
a clutter map describing land use and cover,
a vector database of roadwavs and railways,
a digital elevation model (DEM) containing ground elevations above sea level, and building heights if necessary.

Key benefits

Off-the-shelf, ready-to-use products delivered to you quickly.
Multiscale archive covering all the world痴 major cities updated regularly with newly acquired imagery.
Experienced data processing partners.
Highly accurate DEM for determining building height and/or density classes.
Data formats compatible with the main software applications used to study radio signal propagation.

Determining building height

Denser third-generation networks require even more accurate geographic information, especially on building height.

Digitizing the contours of buildings on two B&W scenes acquired at different angles and processed to obtain a resolution of 2.5 metres reveals an offset that enables us to assess the height of objects identified using photogrammetry techniques.
This information is combined with a conventional DEM of ground elevations above sea level to give the height of buildings above the ground.
The product is accurate enough for even the most demanding network planners.

Improving knowledge of land use and cover

To usefully describe land use, it is important to determine building height and/or density classes, then to extract height and mean density values for each.
One method is to add to the standard production process used for satellite imagemaps, DEMs and land use maps, an automated or semi-automated classification step of the digital height model containing the elevation of each point above the ground.
When applied to SPOT 5 data, this method can be used to distinguish between groups of buildings according to their height and/or density, making it possible to classify them in even greater detail.

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