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Evaluating ECRINS River Data Accuracy in Flat Lands: A Case Study in Germany

This study investigates the accuracy of river mapping data from ECRINS by comparing it with actual terrain in flat areas of Germany. A subset of rivers was exported to KML format for visual analysis using Google Earth. Key aspects assessed include distance measurements and the identification of both small and large rivers. The findings reveal issues such as misplaced river segments and inaccuracies due to canalization, demonstrating the need for cautious interpretation of digital river data in regions with low elevation and complex hydrology.

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Evaluating ECRINS River Data Accuracy in Flat Lands: A Case Study in Germany

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Presentation Transcript

  1. Random checking of ECRINS vs. terrain accuracy in flat areas Philippe Crouzet EEA

  2. Principles: • A subset of rivers from ECRINS has been selected in the part of Germany • The set has been exported to KML at the 1:250000 to be superimposed to GoogleEarth • Visual examination, with measurement of distance are screen captured and reported. • This assessment aims to capture very small to larger river and has no statistical represnetativeness; despite random selection was carried out according to terrain knowledge.

  3. Area selected

  4. Denmark, Jutland

  5. Denmark, Sjaeland

  6. Schleswig DE-DK

  7. Germany, Mecklenburg Artificial ditch; some inaccuracy in final placement

  8. Germany - Poland River dead arm, not taken Correct small tributary Defluence, one only to select sea Rather accurate set of managed river between ponds

  9. Germany. Canal issue Non existing river segment, hydrological coinsistency nevertheless kept Müllrose city Oder-Spree canal

  10. Germany Frankfurt Oder Partly inaccurate headwater segment (river partly canalised) Artificial canal leading to misplaced river segment Misplaced river segment, hydrological coinsistency nevertheless kept

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