Simple download service (Atom) of the dataset: Departmental inventory of rivers in Finistère for the year 2016

L_INVENTAIRE_CE_DDTM_029_2016: Archive layer for the year 2016.
The current layer is L_INVENTAIRE_CE_DDTM_029 (unspecified year = current year)

29504 polylines representing the departmental inventory of rivers in Finistère to December 2016, 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 9424 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_2016：对应2016年的归档图层。
当前通用图层为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29504条多段线（polyline），用于呈现截至2016年12月的菲尼斯泰尔省（Finistère）河道部门清单，该清单经更新后，作为2011年7月18日第2011-1057号省长令的附件文件。

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

本清单为综合成果，基于法国国家地理研究院（IGN）BD TOPO基础地理数据库的河道图层元素进行增补、修改与移除，更新内容约占2011版BD TOPO河道图层的20%。

根据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发展与海事管理局（DDTM）三方达成的协议，BD TOPO纳入了本清单中的绝大多数元素。此后，BD TOPO与本部门河道清单因各方视角差异出现了小幅分化：法国国家地理研究院侧重地理意义上的河道定义，而菲尼斯泰尔省领土发展与海事管理局/菲尼斯泰尔省农业商会（CA29）则依据《水法》的法定定义，同时双方在属性字段设置上也存在分歧。

因此，BD TOPO的河道总长度为9869千米，而本清单的河道总长度为9424千米，二者差异主要源于前述定义分歧：如河口与水体的虚拟延伸段、汊流或枝状溪流、地下径流与地表径流河道等。

由于BD TOPO的水文主题图层现已开放为公开数据，且本部门河道清单与BD TOPO的差异率不足1%，因此本清单如今也可在GeoBretagne平台发布——此前因授权问题无法实现该操作。