 Road Network - ArcInfo Coverage
The attribute information of the ArcInfo road coverage is contained in the
Arc Attribute Table (AAT) and the Node Attribute Table (NAT). The following
table shows the contents of the Arc Attribute Table:
Notes: LINKTYPE, LINKCAT, SPEED and FERRY_TIME give general information on links. SPEED gives the national speed limits according to the link category and country. Access links have a general speed of 30 km/h. For ferry links and the Eurotunnel link, the SPEED item is not set. Conversely, the item FERRY_TIME gives the travel times in minutes for these links. For regular road links, this item shows a value of zero. TENCAT, TENALIGN, CATEGORY and PRIORITY indicate the inclusion of the specified link in the TEN and TINA programmes according to European Commission (1996) and TINA Secretariat (1999). Information on those links which are included in the "Trans European transport Network Outline Plan, Section Road" are taken from the Joint Decision of the European Parliament and of the Council published in the Official Journal of the European Communities (L228, 9 September 1996). Information on those links which are included in the TINA networks are taken from „TINA Transport Infrastructure needs Assessment. Identification of the Network Components for a Future trans-European Transport Network in Bulgaria, Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia and Slovenia“ (TINA Secretariat 1999) as agreed between the European Union and the candidate countries. Strategic indicates whether the link is part of the strategic road network. The strategic road network is a subset of the total network used in the DGVII projects STREAMS, SASI and STEMM. The strategic road network contains the trans-European road links specified in Decision 1692/96/EC of the European Parliament and of the Council for the EU member states, the TINA networks as agreed between the European Union and the Candidate countries, the ‚Helsinki‘ corridors towards eastern Europe as well as selected additional links in eastern Europe and further links to guarantee connectivity of regions and centroids. The access links are functional links used for transport modelling to connect centroids to the network. Centroids represent the centers of transport modelling zones and are used their as origins and destinations. Each centroid is connected to the real-word network via one or several access links. If transport models are not to be applied, the access links (and so the centroid nodes) can be dropped from the network without harming the overall network as such. The following table shows the contents of the Node Attribute Table:
Notes: The regions are regions of the system of regions defined for the STREAMS and SASI projects. They correspond largely to NUTS-2 regions defined by Eurostat plus equivalent extensions outside the European Union. A more detailed description of the system of regions is available. The main city (not neccessarily the greatest city) of each region is the centroid of the region. For each region the nodes are counted from 0000, with 0000 indicating the centroid. Border nodes are nodes at national borders. At each border crossing there is a border node. Border nodes have two node numbers, country codes and region codes indicating that they belong to two different countries. Regular nodes have no entries in NODEID2, COUNTRY2 and REGION2. © 2002 IRPUD Home | Data Formats | Contact | IRPUD |