Dallas Wetlands SVG Map: With Aerial Photograph

If you do not already have an SVG viewer, download the Adobe SVG Viewer v3 first.
See the Dallas Wetlands page for further information about the project and the reasons for choosing SVG.
There is also a low bandwidth version without the photograph also available.

The above is a simple demo of the data collected in the initial Dallas Wetlands project, displayed using SVG and Javascript/ECMAScript. The underlying photograph is downloaded as a series of tiles, but the total size of this photograph is over 2MB. If this is too high, try the vector only version of the Dallas Wetlands Map.

Use the buttons on the right to zoom and pan around the display.

The squares mark sample locations. Click on one of these to display the information for this location. Available information includes the name of the student team which acquired the data for that location, their findings, and the dominant wetland indicator species (if present).

Select the "Display" buttons to highlight locations according to whether they were deemed a wetland according to the different measures. Available measures are Soil, Hydrology, and Vegetation. A location is marked as a wetland, if it satisfies two of these measures. In this example the source data is limited, because a null result (ie. unable to determine the measure) is treated the same as a false ('N') result.

Locations are drawn in three ways. A light blue/cyan marker shows a highlighted location (default has all of them highlighted). A darker blue marker is an un-highlighted location. A pulsing red/yellow marker shows the current selected location.

The overhead photograph is from 2000. The wetland boundary has changed and extra sports fields have been built since it was taken. Field data was acquired during Spring 2002.

Geographic location: The aerial photograph is of the west side of the University of Dallas campus. Las Colinas is to the north-west and the Texas Stadium is to the east. As can be seen, much of the western section of campus is woodland. The area where this survey was taken is the location of the old beaver dam (present when the aerial photograph was taken).

Return to the main Dallas Wetlands page.