InfoAsset Manager has a default coordinate system that is used for all new networks (excepted when no map control is specified). The co-ordinates entered for network objects are assumed to relate to this system unless you specify otherwise.
Note: Automatic system allocation does not apply to databases without a map control (map control is set in the
Options dialog). If you want to use web mapping services on such GeoPlans, it is necessary to select an
online map projection system.
To change the coordinate system for an existing network:
- Select Set coordinate system from the GeoPlan menu. The
Select Coordinate System dialog or the
Projected Coordinate System dialog, depending on the map control being used, is displayed.
- Select the coordinate system to be used:
- For ArcGIS Engine and ArcGIS Desktop map controls - click Browse and select a Projected Coordinate System from the standard Windows File Open dialog.
- For a MapXtreme map control,
InfoAsset Manager is supplied with a number of nationally-recognised coordinate systems from which you can select the required system:
- For the ArcGIS Maps map control, there are a number of projected coordinate systems from which you can select the required system:
- If you choose Non-Earth coordinates, enter your projection system bounds. (These fields are greyed out for all other coordinate systems.) The maximum values for X and Y must be greater than the minimum values, and all values must be greater than zero.
- If you want the selected system to become the default for all new networks, click Default and confirm that the coordinate system is to be used in future.
- Click OK to apply the new coordinate system.
After changing the coordinate system, the coordinate values that have been entered for any existing network objects will remain the same, so the position of these objects on the background map will change to reflect the new system. You may then need to
move existing network objects.
Tip: Note that you can change the coordinate system as soon as you have created a network, before adding any objects.
Geographic coordinate transformations
Copyright Statement
- Portions of this computer program are owned by ESRI, Copyright © 2004 Environmental Systems Research Institute, Inc. All Rights Reserved.
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When using ArcGIS Desktop/ArcGIS Engine as map control, geographic transformations can be specified to allow datasets which have different geographic coordinate systems to be mapped together.
Click the Geographic coordinate transformations Edit button on the
Projected Coordinate System dialog to display the Geographic Transformations dialog.
Transformations available are those which are related to the current GeoPlan coordinate system. One transformation may be selected for each available coordinate system.
Transformations are saved as part of the coordinate system. Changing the GeoPlan coordinate system will clear all previously set transformations.