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)