Map Viewing Service (WMS) of the dataset: Departmental inventory of rivers in Finistère for the year 2015

L_INVENTAIRE_CE_DDTM_029_2015: Archive layer for 2015.
The current layer is L_INVENTAIRE_CE_DDTM_029 (unspecified year = current year)

29477 polylines representing the departmental inventory of rivers in Finistère to December 2015, as annexed to Prefectural Decree 2011-1057 of 18/07/2011, updated.

This inventory is described in particular on:
http://finistere.gouv.fr/Politiques-publiques/Environnement-risques-naturels-et-technologiques/Police-de-l-eau/Inventaire-departemental-des-cours-d-eau-du-Finistere

The inventory is a composite work consisting of additions, modification and removal of elements from the stream layer of the BD TOPO IGN (C), up to about 20 % of the 2011 line. Following a tripartite agreement IGN, Chamber of Agriculture of Finistère, DDTM of Finistère, BD TOPO incorporated a large part of these elements. Then, the TOPO BD and the departmental inventory evolved slightly separately, due to the parties’ difference in point of view: IGN on the one hand, DDTM/CA29 on the other, on what a river is in the geographical sense (IGN point of view) and within the meaning of the Water Act (departmental inventory point of view), and on attributes.
Thus, the sum of the river lengths of the TOPO BD is 9 869 km, compared with 9422 in the inventory, the differences being mainly due to these differences in definition: fictitious extension in estuaries and water bodies, nozzle or nozzle streams, groundwater or surface streams, etc.

Since the hydro theme of the TOPO BD is now open-data, the departmental inventory, which differs to less than 1 %, can now also be offered on GeoBretagne, which was not possible previously for licensing problems.

L_INVENTAIRE_CE_DDTM_029_2015：2015年存档图层。当前图层为L_INVENTAIRE_CE_DDTM_029（未指定年份时默认代表当年）。
本图层包含29477条多段线(Polyline)，代表截至2015年12月的菲尼斯泰尔省(Finistère)河道部门清单，该清单作为2011年7月18日第2011-1057号省长令的附件并经更新。
该清单的详细说明可参见：http://finistere.gouv.fr/Politiques-publiques/Environnement-risques-naturels-et-technologiques/Police-de-l-eau/Inventaire-departemental-des-cours-d-eau-du-Finistere
本清单为综合更新成果，基于法国国家地理研究院（IGN）BD TOPO IGN（C）的河道图层进行要素增删与修改，更新内容约占2011版BD TOPO IGN线路的20%。经法国国家地理研究院（IGN）、菲尼斯泰尔省农业商会与菲尼斯泰尔省领土与海洋局(DDTM)三方协议，BD TOPO IGN纳入了其中大部分更新要素。此后，由于双方对地理意义上的“河道”、《水法》定义下的“河道”以及相关属性的认知存在差异，BD TOPO IGN与该部门河道清单的发展路径出现小幅分化：一方为法国国家地理研究院（IGN），另一方为菲尼斯泰尔省领土与海洋局(DDTM)/菲尼斯泰尔省农业商会(CA29)。
因此，BD TOPO IGN的河道总长度为9869千米，而本清单的河道总长度为9422千米，二者差异主要源于定义分歧：例如河口与水体的虚拟延伸段、岔流或分流河段、地下河道与地表河道等。
由于BD TOPO IGN的水文主题数据集现已开放获取，且本清单与BD TOPO IGN的数据差异不足1%，因此本部门河道清单如今也可在GeoBretagne平台发布——此前因版权许可问题无法实现该操作。