All Base and Data Layers are listed in the Map Layers tab along with their parameters. The coordinates may be entered directly during data collection or determined from a street address or other geographical reference point using a GEOCODE command embedded in the Check Code of the data collection form. There are two categories of Data Layers: Choropleth and Dot Density maps associate data records to regions or features by name and rely on geospatial data from external sources S pot and case-cluster maps use latitude and longitude coordinates stored with each data record. In contrast, reference information from map servers, shapefiles, or KML/KMZ files is associated with the map in Base Layers. ![]() Geographic information associated with records collected using the Enter module is placed on the global coordinate system in Epi Map in layers, referred to as Data Layers.
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