Geospatial data of JSC “Latvia’s State Forests” forest infrastructure

As “Latvia’s State Forests” (LVM) forest roads, large culverts and bridges, planned forest roads, turning pitches, culverts, road equipment, transport shifts, exits, ditches, drainage systems and renewable drainage objects. Forest road is a merchant road constructed according to technical parameters with a blanket or a road without a blanket, which ensures forest management and is operable for timber removal. There are more than 4,000 roads in the data layer, with a total length of more than 12 000 km. But the geospatial data layer of forest roads to be developed contains information on forest roads that are planned for renovation, reconstruction or construction in the period from 2018 to 2022. It includes more than 900 lined objects. The geospatial data layer of bridges and large culverts contains information about the engineering structures under the responsibility of LVM. It includes more than 200 point objects — bridges and culverts. The turning area shall be the space enabling the vehicle with a semi-trailer to turn in the direction of travel opposite to that of the vehicle. Trimmings are divided by type — circular turning area and T-shaped turning area. The culvert is a structure that provides a flow of water drains or water courses. Culverts can be built under a forest motorway and exits or on a ditch detachment. The attribute table contains information on the length and diameter of the culvert. Forest road equipment includes road signs, signal barriers, repellent barriers, signal bars and open wooden gates. Road equipment ensures the improvement of vehicle traffic safety. The place of change is an extension of the road carriageway, which ensures the change of two opposite-coming vehicles. The exit is an element of the carriageway of a forest road, which ensures the departure of the vehicle from the main road. Exits have been built at intersections of quarters and places where the forest motorway intersects with natural carriageways in the forest. Forest drainage system is a set of specialised structures and devices for regulating water regime in forest lands. The geospatial data layers of JSC “Latvia’s State Forests” contain information on the infrastructure objects in the company’s possession.本数据集涵盖拉脱维亚国家森林公司（Latvia’s State Forests，简称LVM）所辖的林区道路、大型涵洞与桥梁、规划林区道路、车辆掉头场地、涵洞、道路设施、运输作业班次、驶出路段、排水沟、排水系统以及可再生排水设施。林区道路是指按照技术参数修建的铺筑路面或非铺筑路面的商用道路，可保障森林经营作业与木材转运，具备通行可用性。本数据图层现有超过4000条林区道路，总长度逾12000千米。待完善的林区道路地理空间数据图层则涵盖2018至2022年期间计划翻新、改建或新建的林区道路信息，包含900余个相关地物对象。大型涵洞与桥梁地理空间数据图层涵盖LVM所辖的工程构筑物信息，包含200余个点位对象——桥梁与涵洞。车辆掉头场地指可供搭载半挂式车辆的驾驶员朝与原行驶方向相反的方向完成掉头的空间。该类设施按类型可分为圆形掉头场地与T形掉头场地两类。涵洞是为疏导排水沟渠或河道水流而修建的构筑物，可设置于林区机动车道下方、驶出路段旁或排水沟渠分流段。其属性表包含涵洞长度与管径相关信息。林区道路设施包括道路标志、信号隔离栏、防护隔离栏、警示杆以及开放式木质大门，可提升车辆通行安全性。会车路段是道路车行道的延伸区域，用于保障两辆相向行驶的车辆完成会车。驶出路段是林区道路车行道的组成部分，用于保障车辆从主路驶出。该类设施设置于林区片区交汇处，以及林区机动车道与林区内天然通行道路的交叉点处。林区排水系统是指用于调节林地水文状况的各类专用构筑物与装置的集合。拉脱维亚国家森林股份公司（JSC Latvia’s State Forests）的地理空间数据图层涵盖该公司所辖范围内的基础设施对象信息。