2D Data 

2D High Resolution Datasets

Based on aerial images, the 2D HR datasets are a good compromise between 3D HR and 2D LR data. Conserving a good precision (thanks to the photogrammetric process), they provide a zonal information coupled to the best DTM.

Standard technique: photogrametry
Standard layers: zonal DLU, DTM, linear vectors, Orthophotos
Standard resolution for raster: 5m
Additional layers: georeferenced topomaps, point and text data, adapted client data...

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2D Low Resolution Datasets

For wide areas such as region or countries, SIRADEL proposes Low Resolution datasets derived from satellite or topomaps sources.

Standard technique: teledetection
Standard layers: statistical DLU, DTM or DEM, linear vectors, Orthophotos
Standard resolution for raster: 20m
Additional layers: georeferenced topomaps, point and text data, adapted client data...

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