| Northwest corner | 30 deg, 15 min N, 96 deg W |
| Northeast corner | 30 deg, 15 min N, 95 deg W |
| Southeast corner | 29 deg, 30 min N, 95 deg W |
| Southwest corner | 29 deg, 30 min N, 96 deg W |
Below is a summary of the data located on this disk. Data has been stored in the format in which it was originally received. Future versions of this CD-ROM will contain uncompressed versions of all the data.
A. Digital Elevation Model (DEM) data
30- by 30-meter DEM’s are available for the entire region from the Texas Natural Resources Information System (TNRIS). This data was originally converted from USGS 7.5-minute quads. The following quads fall within the study area:
| Waller NW | Waller | Hockley Mound |
| Magnolia W | Hockley | Warren Lake |
| Magnolia E | Rose Hill | Cypress |
| Oklahoma | Tomball | Satsuma |
| Tamina | Spring | Aldine |
| Outlaw Pond | Maedan | Humble |
| Splendora | Moonshine Hill | Harmaston |
| Plum Grove | Huffman | Crosby |
| Brookshire | Fulshear | Orchard |
| Katy | Richmond NE | Richmond |
| Addicks | Clodine | Sugar Land |
| Hedwig Village | Alief | Missouri City |
| Houston Heights | Bellaire | Almeda |
| Settegast | Park Place | Pearland |
| Jacinto City | Pasadena | Friendswood |
| Highlands | La Porte | League City |
B. NEXRAD-based Rainfall Data
A significant storm swept through southeastern Texas from 16-18 October 1994. Because of its severity, this storm has been chosen as the rainfall event to be included in the model. The data is in a *.tar format at this time with a resolution of one square kilometer. Each *.tar file represents one day in the storm. When a *.tar file is uncompressed, each of the newly-formed files represents a single point in time on that given day. At each coordinate point at each time, rainfall intensity is available in mm/hr. Intensities are available approximately once every six minutes throughout the entire event.
Thanks to Mary Lynn Baeck and Jim Smith from the Princeton Environmental Institute for supplying this data.
C. Soil Data
Unfortunately, SSURGO data is only available for a fraction of Texas. Hence, STATSGO data has been chosen for this study. The data was taken from a United States Department of Agriculture STATSGO CD- ROM. Originally, the data was collected from 1- by 2-degree topo quadrangle units with an approximate minimum area of delineation equal to 1550 acres.
D. Digital Line Graph (DLG) Data
1:100,000 scale DLG data for the entire area was downloaded from the USGS. This data was derived from USGS 1:100,000 scale 30- by 60-minute quadrangle maps. All data is in DLG level-3 format.
The following maps fall into the study area:
| Angleton | Brenham | Conroe |
| Eagle Lake | El Campo | Houston |
More information about this data is available via the USGS.
E. Stream Coverages
The Environmental Protection Agency (EPA) maintains RF1 stream coverage data for the entire United States. The scale varies but is approximately 1:500,000. All data are projected in Albers equal area format.
F. Street Coverage
The Environmental System Research Institute (ESRI) has made available a street database for the entire United States. The original source of this data is Geographic Data Technology’s Dynamap/1000 Version 1 street database from 1995. At this point, this coverage is directly viewable with ArcView.
G. Land Use/Land Cover
1:250,000 scale data is available for the entire study area. The land use and land cover map incorporates the Anderson Land Use Code classification system. Data was originally taken from the USGS Houston and Beaumont 1- by 2-degree quandrangle units. Data was downloaded from the TNRIS.
Overview of the file hierarchy on this CD-ROM.