![]() The “Count” field in the database table contains the number of cells that have the same population count as the cell of interest. This is a population count per cell, not a population density. The “Value” field in the database table contains the number of people per cell. The data are referenced by latitude/longitude (WGS84) coordinates. The LandScan Dataset is not projected, but can be used as a “Geographic” projection with various GIS software packages (e.g., ERDAS and ESRI). Included with the data is ORNL produced metadata and various readme files which explain the data and updates. Yes, we have global data as well as sets by world regions and individual countries. No extraction or processing of the data is available through a WMS. A WMS is similar to Bing Maps or Google Earth where the user can view the data and implement simple spatial queries on the underlying data. A WCS allows the users to extract the data and keep it locally for their own use.Ī Web Map Service (WMS) is a standard protocol for serving georeferenced map images over the Internet (http link) that are generated by a map server using data from a GIS database. A WCS is essentially a live link to the data which allows you to symbolize and run processing on the data as if it was stored on your local hard drive. The coverages are objects (or images) in a geographical area, whereas the WMS interface or online mapping portals like Google Maps return only an image, which end-users cannot edit or spatially analyze. Web Coverage Service (WCS) provides an interface allowing requests for geographical coverages across the web using platform-independent calls. These protocols allow for access of GIS data over the Internet. See also “What data formats are used?” below.Ī WMS and WCS are specifications that were developed by the Open Geospatial Consortium in 1999 for publishing of GIS data over the web. Almost any programming language can read this file directly. The data files are also provided in a Raster Binary format. The WMS and WCS are links to the data hosted on East View Geospatial’s servers for organization-wide 24/7 access and can be used with most current GIS software. The data is provided in a hard copy format which is digestible in any GIS software that allows the user to import ESRI GRID-formatted data. See also “What data formats are used?” below. Best performing browsers for web mapping applications include Mozilla Firefox, Google Chrome and IE9+.The data files are also provided in the ESRI Raster Binary format. If you are accessing LandScan through East View’s web application, no additional software is needed, only a web browser.
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