Pima County Department of Transportation

Geographic Information Services Division

Overlapping Data in a MapGuide Layer

Key Points for Review

Overlapping Data in a MapGuide Layer explains overlapping map features within one map layer. This page is a list of key points to review what you've learned.

Getting Ready

1. Zoom in!

2. You may need to turn off Parcels or other layers "on top" of the layer with overlapping map features.

3. Overlap order generally has no meaning.

4. Map tips only show what is on top.

Selecting Overlapping Map Features Within One Layer

1. Single-click selects only select whatever is on top. Don't use single-click selections to report on overlapping map features.

2. Use "Intersection" selection mode (most of the time).

3. Select map features to report by area.

4. Selecting an object makes the negative color of that object.

5. When two overlapping objects are selected, the color changes cancel.

6. Inadvertently selecting other map layer features is irrelevant to overlap layer reporting.

7. You can define an area of interest with the select tools, with the Draw Polygon tool, or by using existing map features (such as parcels).

Reporting on Overlapping Map Features

1. Reports of overlapping map features let you:
   • Use cursor up/down keys or roll the mouse over the results to select corresponding map features.
   • Zoom to a selected map feature.

2. Close report windows when done. You may get errors when an old report window is open.