Matix GIS Integration – Override Layer Map Extent

Overview

The map extent is the limit of the geographic area displayed on a map. This area is usually defined by a rectangle. In the case of a dynamic map display, map extent may be changed by the zoom or pan action. The Override Layer Map Extent is a feature that will override the default Layer Map Extent parameters. Each layer has its specific defined extent. When system errors are caused by defined extent values, provisions are now available to override and reset them.

Functionalities

The rectangular extent limits (XMin, YMin and XMax, YMax), and spatial reference, i.e. the value required to display your data in the correct geographic location, of the defined area are displayed near the bottom left hand side of the ArcGIS REST Services Directory. The following is an example of a path that may be used: AppServerName > arcgis > rest > services > Parcels

In instances where issues arise as a result of the defined extent values, there is a tool that can be used to override and reset these values.

For Example:

In a situation where the map extent default values are:

• XMin: 133998.98780000024
• YMin: 5427385.8651
• XMax: 766054.8088999996
• YMax: 6633853.2072
• Spatial Reference: 26913 (26913)

The above values are generating an error. When these values are overridden, the error is resolved. The following override values need to be entered:

• XMin: -2.00375
• YMin: -195164.8
• XMax: 2.00375
• YMax: 1.997186
• Spatial Reference: 3857 (3857)

Configuration

Map Extent group – Override Map Extent

A group box has been added to the Matix Server Configuration tab. The Map Extent group contains the parameters required to modify map extent values.

After the override values have been entered, the Reset the default values button that is located beside the group label Map Extent will be enabled. To reset the default values…

1. Click Reset the default values.
2. A confirmation window will be displayed, with the confirmation message, “Reset the default map extent?”.
3. Click Yes to accept and reset the values.
4. When the values have been reset, the Reset the default values button will be disabled.

Viewing the results in Govern

When the extent values have been reset, return to the Matix GIS interface in Govern. An indication that the issue has been reset is the presence of the Distance Scale at the bottom of the map is an indication of the correction, in addition the map projection will be flat.

Documentation

Click to view the PDF version of this page.

 

 

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