Spatial Queries

To open the Spatial Search Options dialog box, select Map | Perform Spatial Query from the Main Menu bar, or, click on the Map Tools toolbar. The Perform Spatial Query option enables you to search for facilities and wells within an area using a geometric shape.

Database

Select the database that you wish to search. You can select from a standard database, or you can select one of your result sets and refine your results by searching a particular area. If your selection doesn't match the area you are searching, you will receive a pop-up warning. For instance, if you viewing a map of Alberta and attempt a search of Manitoba wells (MB_WELLS database) you will receive the following error message:

Query Error Warning

Change your database selection or move to another coordinate area on the map and try the spatial query again.

Create Boundary

Select this option if you wish to draw a boundary line on the map after you have run the query.

Search Method

Determine how the area will be drawn for your query. Every object within the drawn geometric will be included in the query.

Rectangle - Draw a rectangle from the top-left corner to the bottom-right corner.
Circle + Radius - Draw a circle from a center point with a set radius.
Radius (km) - Enter the radius length for the circle in kilometres.
Circle - Draw a circle by drawing a rectangular frame from the top-left to the bottom-right.
Line + Distance - Draw a line by clicking a start point and an end point with a set distance on all sides of the line as the inclusion area.

Distance (km) - Enter the inclusion distance from the line in kilometres.

Polygon - Draw your own polygon or use a template.
- Use Drawn Polygon - Create a polygon by clicking from point to point to point; GeoVista draws lines between the points to create the polygon. If you want to delete the last point you drew, press <Backspace> on your keyboard, or press <Escape> to cancel drawing the polygon entirely.
- Get Boundary From File - Check to open a boundary template file to create your polygon such as the PSAC Area files in .PGF.
Input datum - Select NAD27 or NAD83 to match your boundary template

Result Sets

Select your end result set from the drop down list. The selections are Wells, Transportation, Pipelines & Facilities, Watershed, Grid, Culture, and Land.

Buttons

Click <OK> to accept your query options or <Cancel> to clear the query.