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It is the ability to produce a map image that sets GIS apart from other database systems. Perhaps more simply, a GIS gives you tools to answer questions about a location (geographic information). You can combine layers of information stored in a database that may include addresses, aerial photographs, dates, and other numerical values.
ArcGIS Desktop users can extract an imagery tile approximately one-mile square by accessing the City's imagery services (see FAQ topic), adding the desired service into their map document, and then following these simple steps:1. Select the imagery service from the ArcMap table of contents.2. Right click on the imagery layer and select Data > Export Data...3. Select the Data Frame radio button in the Extent section4. Note the output location on your local harddrive5. Select your desired image format, compression type, and compression quality6. Click Save.
This will create a copy of the image extent on your local computer. The highest resolution imagery is limited to a one-mile tile for performance reasons.
To access our imagery and other map services:1. Open ArcCatalog2. Click on GIS Servers > Add ArcGIS Server3. Select “Use GIS Services” and click Next4. Enter the URL “http://maps.nbtexas.org/arcgis/services” and click finish. This will create a connection called “arcgis on maps.nbtexas.org”.5. Open the connection and open either the Maps or Imagery folder6. Select the desired service and add to your ArcMap document.
CAD users will need to use the ArcGIS for AutoCAD software plug-in developed by Esri and use the same URL to similarly configure it based on their particular system.