(1) vector spatial data layers in ArcView shape file format for bedrock geologic units, contacts and data points;
(2) JPEG images from the final published map
(3) metadata in FGDC compliant format for all spatial layers.
The vector data include name for geologic unit and a line-type indicator.
Vector data are in the geographic coordinate system, decimal degrees, NAD83.
For a detailed list of the files included in the data product, see the Supplemental_Information section.
The data were published in 2001 on an ISGS Illinois Geologic Quadrangle Map of the Bedrock Surface, Villa Grove Quadrangle, Douglas County, Illinois, Illinois by C. Pius Weibel and Zakaria Lasemi. The data in this compilation do not include all the information on the published map. Refer to the published map for a complete explanation of the bedrock geology of the Villa Grove Quadrangle.
The nominal scale is 1:24,000.
Detailed List of Files included in the product ---------------------------------------------- Folder Filename Size(kb) Filetype Description ----------------- -------------- -------- --------------------------------------------- ------------------------------------------------------ dp00005 bdgeo_ln.dbf 4 shapefile dBase component geologic contacts - map boundaries dp00005 bdgeo_ln.prj 1 shapefile projection component geologic contacts - map boundaries dp00005 bdgeo_ln.shp 46 shapefile geologic contacts - map boundaries dp00005 bdgeo_ln.shx 1 shapefile component geologic contacts - map boundaries dp00005 bdgeo_py.dbf 3 shapefile dBase component geologic units dp00005 bdgeo_py.prj 1 shapefile projection component geologic units dp00005 bdgeo_py.shp 81 shapefile geologic units dp00005 bdgeo_py.shx 1 shapefile component geologic units dp00005 data_pt.dbf 157 shapefile dBase component data points dp00005 data_pt.prj 1 shapefile projection component data points dp00005 data_pt.shp 8 shapefile data points dp00005 data_pt.shx 3 shapefile component data points dp00005 readme.htm 14 ASCII text imbedded in HTML describes this data bundle Folder Filename Size(kb) Filetype Description ----------------- -------------- -------- --------------------------------------------- ------------------------------------------------------------- dp00005/images browse_l.jpg 610 JPEG/JFIF image large browse graphic dp00005/images browse_m.jpg 474 JPEG/JFIF image reduced resolution image of the mapped quad as it appears on the published map dp00005/images browse_s.jpg 5 JPEG/JFIF image small browse graphic dp00005/images locmap.jpg 56 JPEG/JFIF image location map from published map Folder Filename Size(kb) Filetype Description ----------------- -------------- -------- --------------------------------------------- ------------------------------------------------------------- dp00005/metadata bdgeo.htm 17 metadata in FGDC HTML outline format geological units and contacts metadata dp00005/metadata data_pt.htm 20 metadata in FGDC HTML outline format data point metadata dp00005/metadata dp00005s.htm 23 metadata in FGDC HTML outline format overall metadata document to describe this data bundle dp00005/metadata dp00005sf.htm 23 metadata in FGDC HTML FAQ format overall metadata document to describe this data bundle
Any hardcopies utilizing DNR data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent DNR data sets, nor to imply that changes they made were approved by DNR.
These data are not to be used for commercial profit.
These data should not be used at scales greater than 1:24,000.
In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR.
It is assumed that those who wish to download, unzip and use these data are technically proficient in using the Internet, file zipping software, and GIS software. The ISGS will entertain questions about the data, but will not provide support of any kind in regard to the use of the Internet or any particular software package.