gauge limitation

Attention new flow URL carto.ain.fr becomes geodata.ain.fr Last modification of the graph Nov 2023: decommissioning of the RD979 from Boulevard Charles de Gaulle to the roundabout of the Alagnier (urban part in the town of bourg) avenue Amédée Mercier Roads are all represented by a single axis even in the case of separate pavements. At junctions / intersections, sections not participating in the main road are cut off at the outer edge of the junction (stop / cede the passage). To ensure the topology of the road graph pseudo roads have been added (categorie_admin=intersection) but do not participate in the linear of the RD. For roundabouts, the calculation of the PR+abs follows the axis of the roundabout in the direction of the route (meaning of the PR) and thus travels part of the roundabout virtually while physically there is a discontinuity (PV_beginning / PV_end). The field 'categorie_admin' allows to know its use. rd / intersection / junction_pn / roundabout. The total length of the network coming together as the sum of the cumulf-cumuld of the rd and giratoire. Field determination rule: axis the wording of the route is in the form of Dxx (e.g. D23) For roads with name extensions (letter after the number of the RD), this extension is added afterwards with a minus (indent of 6) in separator (e.g.: D23-C). For roundabouts an extension 'GIRxxx' is added next with an underscore (tiret of 8) as a separator. ex D72-A_GIR_02_0262. PR of the entry of the roundabout on 2 characters with 0 in prefix to complete 4-character abscissa of the roundabout entry with 0 prefixes to complete Field determination rule: axis_cd01 Axes of the Departmental Routes of Ain (e.g. 01 D0117A). Rules for naming roundabouts (in the process of being entered): E.g.: GIR0117A_09_0611 GIR route type prefix RD number on 4 characters with 0 in prefix to complete Letter from RD with _ if no letter Separator _ PR of the entry of the roundabout on 2 characters with 0 in prefix to complete 4-character abscissa of the roundabout entry with 0 prefixes to complete Intersection management scheme: 注意：新的流量访问地址已从carto.ain.fr变更为geodata.ain.fr。 2023年11月道路网最后更新：已停用省道(Route Départementale，简称RD)979号中从戴高乐将军大道（Boulevard Charles de Gaulle）至阿拉尼耶环岛(roundabout)的路段，该路段位于布尔格镇城区的阿梅代·梅西耶大道（avenue Amédée Mercier）沿线。 即便存在分隔式人行道，道路仍以单轴线形式进行表达。在交叉口/路口处，非主路参与的路段会在交叉口外边缘处截断（需停车/让行）。为保障道路网拓扑结构，已添加虚拟道路（categorie_admin=intersection，即分类标识为交叉口），但此类虚拟道路不计入省道的线性里程。 对于环岛(roundabout)，参考点(Point de Repère，简称PR)+横坐标的计算沿环岛轴线并遵循行驶路线方向（PR的含义），因此会虚拟行经环岛的部分路段，而物理上此处存在断点（PV_beginning / PV_end）。 `categorie_admin`（管理分类）字段可用于标识要素用途，取值包括：省道(rd)、交叉口(intersection)、路口优先通行节点(junction_pn)、环岛(roundabout)。道路网总长度为所有省道(rd)与环岛(giratoire)的cumulf-cumuld之和。 ### 轴线字段命名规则 路线编号格式为Dxx（示例：D23）。若省道编号带有后缀字母，则在编号后以连字符（缩进6个字符）作为分隔符添加后缀字母（示例：D23-C）。 环岛要素的编号后缀为`GIRxxx`，以下划线（缩进8个字符）作为分隔符。示例：D72-A_GIR_02_0262。 环岛入口PR值为2位字符，不足时以0补全前缀；环岛入口横坐标为4位字符，不足时以0补全前缀。 ### axis_cd01字段命名规则 安省（Ain）省道轴线编号格式为「XX DXXXX[字母]」（示例：01 D0117A）。环岛命名规则（正在完善中）： 示例：GIR0117A_09_0611，其命名规则为： 1. GIR为路线类型前缀； 2. 省道编号为4位字符，不足时以0补全前缀； 3. 省道后缀字母，若无后缀则以下划线替代； 4. 分隔符为下划线； 5. 环岛入口PR值为2位字符，不足时以0补全前缀； 6. 环岛入口横坐标为4位字符，不足时以0补全前缀。 交叉口管理方案：