| Historical Maps |
| The search and assessment of historical maps supporting the investigation of previous utilizations and constructions of recent brownfields define a common standard. |
| Particularly the entry's location of hazardous substances can be precisely identified by a qualified assessment. |
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Historical Air Photography and Current Satellite Data |
| Additional important clues are provided by previous air photography and current satellite data. All images and determined data will be integrated and organized by a Geographic Information System (GIS). |
| Particularly in urban areas air photography provides important basic data of ammunition's contamination and supports protection of the population. |
