What are the components of a shapefile?
Three components are mandatory: a main file that contains the feature geometry (. shp), an index file that stores the index of the feature geometry (. shx), and a dBASE table (. dbf) that stores the attribute information of features.
Do shapefiles have topology?
A shapefile is a nontopological data structure that does not explicitly store topological relationships. However, unlike other simple graphic data structures, shapefile polygons are represented by one or more rings.
What is the use of shapefile?
A shapefile is an Esri vector data storage format for storing the location, shape, and attributes of geographic features. It is stored as a set of related files and contains one feature class.
How are shapefiles generated from OpenStreetMap data?
For these, OpenStreetMap data is preprocessed by splitting each road at each junction, so that the resulting shapefiles contain only road segments. The preprocessing step is slightly different for automobile, bicycle, or pedestrian routing.
Can a shapefile be used for graph processing?
For graph processing (e.g. routing or reachability analysis with software like Network Analyst) we also offer special routable shapefiles which only include the road network. For these, OpenStreetMap data is preprocessed by splitting each road at each junction, so that the resulting shapefiles contain only road segments.
Which is an example of an extended shapefile?
These extended shapefiles are laid out according to our standard, “OpenStreetMap Data in Layered GIS Format”, which we update continuously. Here are two example shapefiles for you to download (the files contain all layers, not only those depicted): Dresden: landuse, buildings, railways.
How big of a file is Toulouse shapefile?
Download: 34 MB; all layers. Toulouse: streets, railways, waterways. Download: 63 MB; all layers. For graph processing (e.g. routing or reachability analysis with software like Network Analyst) we also offer special routable shapefiles which only include the road network.