Random checking of ECRINS vs. terrain accuracy in flat areas
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Transcript of Random checking of ECRINS vs. terrain accuracy in flat areas
Random checking of ECRINS vs. terrain accuracy in flat areas
Philippe Crouzet
EEA
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.
Area selected
Denmark, Jutland
Denmark, Sjaeland
Schleswig DE-DK
Germany, Mecklenburg
Artificial ditch; some
inaccuracy in final placement
Germany - Poland
Defluence, one only to select
River dead arm, not taken
sea
Correct small tributary
Rather accurate set of managed river between ponds
Germany. Canal issue
Non existing river segment, hydrological coinsistency
nevertheless kept
Oder-Spree canal
Müllrose city
Germany Frankfurt Oder
Misplaced river segment, hydrological coinsistency
nevertheless kept
Artificial canal leading to misplaced river segment
Partly inaccurate headwater segment (river partly
canalised)