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 high bandwidth version with a
2MB aerial photograph also available.
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| KEY | |
| Roads | |
| University of Dallas buildings | |
| Sports fields | |
| Approx. wetland extents in 2000 |
The above is a simple demo of the data collected in the initial Dallas Wetlands project, displayed using SVG and Javascript/ECMAScript. This is the vector-only version of the map. There is a second version, which is based on an version based on an aerial photograph, but the photograph is a large download (over 2MB).
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.