Dataset Direct Download Service (WFS): Departmental inventory of rivers in Finistère for the year 2014

L_INVENTAIRE_CE_DDTM_029_2014: Archive layer for the year 2014.
The current layer is L_INVENTAIRE_CE_DDTM_029 (unspecified year = current year)

28882 polylines representing the departmental inventory of rivers in Finistère to December 2020, 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 9238 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_2014：2014年归档图层。当前图层为L_INVENTAIRE_CE_DDTM_029（未指定年份时默认代表当前年份）。

本数据集包含28882条多段线(Polyline)，对应截至2020年12月的菲尼斯泰尔省(Finistère)河道部门清单，该清单为2011年7月18日第2011-1057号省长令(Prefectural Decree)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

本清单是基于法国国家地理研究所(IGN)的BD TOPO(BD TOPO)河道图层进行要素增、删、改后的复合成果，修改量约占2011版BD TOPO河道图层的20%。根据IGN、菲尼斯泰尔省农业商会与菲尼斯泰尔省DDTM(DDTM)三方达成的合作协议，BD TOPO纳入了该清单中的大部分要素。此后，BD TOPO与部门河道清单因双方对河道的地理定义（IGN视角）和《水法》定义（部门清单视角）以及属性字段的认知差异，出现了一定程度的独立演化。

因此，BD TOPO的河道总长度为9869千米，而本部门清单的河道总长度为9238千米，二者的差异主要源于定义分歧：例如河口与水体的虚拟延伸段、分流河道、地下径流与地表径流等。

由于BD TOPO的水文主题数据集现已开放数据，且本部门清单与BD TOPO的差异率不足1%，因此本清单如今也可在GeoBretagne(GeoBretagne)平台发布——此前因授权许可限制无法完成该操作。