Location and surfaces of water bodies of more than 1 000 m² in Corrèze

N_PLAN_EAU_IFN_S_019 N_PLAN_EAU_IFN_P_019 DIREN Limousin has entrusted the National Forestry Institute (IFN) the cartographic inventory of the ponds of Limousin from orthophotoplanes. The shots date from 1999 for Corrèze and 2000 for the High Come and the Creuse. Given the resolution of the photographs, only ponds of which the area is more than 1 000 m² have been inventoried. Some synthetic data on this work as well as the comparison with the SCAN25 on the one hand and the BD CARTHAGE® on the other hand contained in document (http://diren.dev.eservices.fr/donnees/eau/etangs/rendu.asp?page=etangs_presentation) This inventory is only partial since it concerns only ponds of more than 1 000 m² and which are visible in the photographs (in water at the time of shooting). Finally, it should be mentioned that bodies of water that borders two departments have been accounted for in each of the departments and for the area concerned on the department (in particular Vassivière) which decomposes into 1 body of water in Upper Vienna of 448 Ha and two bodies of water in Creuse 153 Ha and 331 Ha) or Lavaud or Bort les Organs which are accounted for only for the area included in the region. This significant work of scanning on infrared boards colors leads to a fairly complete inventory of bodies of water from more than 1 000 m² (which corresponds to the reporting threshold administrative). The reliability of this inventory is very good both at the level of the completeness of the base as of the outline of the contours and thus of the surfaces estimated. This leads to a very interesting tool for bets that can now compare their administrative base of declared ponds with this inventory (undeclared ponds, comparison of areas declared,...). But it is also an interesting basis for characterisation of pond heads since we can quickly know the number of ponds and the area of water they represent in a given territory __Origin__ The work was carried out in 2004 by the IFN. The rendering has a basis digitised data with for ponds with a surface area greater than 1 Ha, the contour of the pond and for those where the area is included between 1 000 m² and 1 Ha a symbol positioned on the body of water. The methodology consists of examining on microcomputer the boards infrared colors that have been previously orthorectified, to identify areas supposed to be bodies of water (very good visibility in infrared) and which are of a size greater than 1 000 m² and to be traced the contour of areas with a surface area greater than 1 Ha. It is, therefore, a question of very heavy but reliable work. __Partner organisations__ DREAL Grand Est [ex-Lorraine] (Regional Directorate for the Environment, Environment, Planning and Housing Grand Est), DDT Corrèze __Links annexes__ * [XML metadata view](http://ogc.geo-ide.developpement-durable.gouv.fr/csw/all-dataset?REQUEST=GetRecordById&SERVICE=CSW&VERSION=2.0.2&RESULTTYPE=results&elementSetName=full&TYPENAMES=gmd:MD_Metadata&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&ID=fr-120066022-ldd-0713ac1f-540a-4019-824d-938427daca9d) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/4c3950d63a4cea1e3f9041a1024809186aad5db1)