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Roads dataset from South Australian Government Data Directory. Shapefile (GIS) dataset of every sealed and unsealed road in the state, and has been recently created and updated (2013). Data includes road names, route numbers, and class (Highway, Arterial, etc.). The license is CC-BY-3.0-AU, so it can be used to create maps.
Please note that shapefiles are not topological, therefore may create slivers when comparing TIGER/Line boundaries. This mismatch was not possible when the census TIGER files were available in ASCII format that was topological unlike shapefiles. The Census Bureau has made the data available through WMS servers. [4]
U.S. Gazetteer, TIGER/Line shapefiles, census data. National Historical Geographic Information System: NHGIS provides free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2012. Atlas of Historical County Boundaries Project (AHCBP)
The shapefile format is a geospatial vector data format for geographic information system (GIS) software.It is developed and regulated by Esri as a mostly open specification for data interoperability among Esri and other GIS software products. [1]
Five million place names, political boundaries, latitude/longitude lines, and other data can be displayed. WorldWind.NET provided the ability to browse maps and geospatial data on the internet using the OGC's WMS servers (version 1.4 also uses WFS for downloading place names), import ESRI shapefiles and kml/kmz files. This is an example of how ...
The GAUL always maintains global geographic layers (in shapefile format) with a unified coding system at the levels of country, first administrative (e.g. regions), and second administrative (e.g. districts). In addition, when data is available, it provides layers on a country-by-country basis down to third, fourth and lower levels.
[12]: 218 A topology rulebase is a list of desired topology rules used to enforce spatial integrity in spaghetti data, such as "county polygons must not overlap" and "state polygons must share boundaries with county polygons." [13] Vector datasets usually represent discrete geographical features, such as buildings, trees, and counties.
Australia's exclusive economic zone (EEZ) was declared on 1 August 1994 and extends from 12 to 200 nautical miles (22 to 370 km) from the coastline of Australia and its external territories, except where a maritime delimitation agreement exists with another state. [1] [2] To the 12 nautical-mile boundary is Australia's territorial waters.