Digital (GIS) Data
GIS Data is Available for the Following Quads
Many of the published ISGS IGQ and IPGM geologic quadrangle maps are available in digital (GIS) data format. A zip file linked to each of the following maps contains GIS files, metadata, supporting documentation, and graphic files for viewing. See the contents description below.
(BG = Bedrock Geology; G = Geology)
(IGQ = Illinois Geologic Quadrangle Map; IPGM = Illinois Preliminary Geologic Map)
| Quadrangle | Theme | Series | Quadrangle | Theme | Series | |
|---|---|---|---|---|---|---|
| Ava | BG | IPGM | Mt. Pleasant | BG | IGQ | |
| Bandana | G | IGQ | Murphysboro | BG | IPGM | |
| Bethalto | BG | IPGM | New Athens West | G | IPGM | |
| Brownfield | BG | IGQ | Olmsted | G | IGQ | |
| Cairo | G | IGQ | Oraville | BG | IPGM | |
| Carrier Mills | BG | IGQ | Paducah NE | BG | IGQ | |
| Crab Orchard | BG | IGQ | Pittsburg | BG | IGQ | |
| Crab Orchard Lake | BG | IGQ | Pomona | BG | IPGM | |
| Cypress | G | IGQ | Prairie du Rocher | BG | IPGM | |
| Elsah | BG | IGQ | Prairietown | BG | IPGM | |
| Fishhook | BG | IPGM | Pulaski | G | IPGM | |
| Freeburg | BG | IPGM | Raddle | BG | IPGM | |
| Harrisburg | BG | IPGM | Red Bud | G | IPGM | |
| Herrin | BG | IGQ | Rockwood | BG | IPGM | |
| Johnston City | BG | IGQ | Vergennes | BG | IPGM | |
| Joppa | G | IGQ | Vienna | BG | IPGM | |
| Karnak | G | IGQ | Welge | BG | IGQ | |
| Kellerville | BG | IPGM | Willisville | BG | IPGM | |
| Marion | BG | IGQ |
List of Distribution File Contents
The downloadable distribution file (zip) may contain any of the following:
README.htm … description of contents
Data Files
[filename].mdb … ArcGIS geodatabase in MS Access format
[filename].pmf … ArcReader map document
Isgs_Gmdm_[ver].style … ArcGIS map symbol definition
[filename].pdf … Full-scale rendition of published hardcopy map
[filename]_report.pdf … Report that accompanied published hardcopy
map
metadata.htm … Description of the data in FGDC metadata form
Data Dictionary Files
Isgs_Gmdm_Catalog_Tree_[ver].pdf … ArcCatalog view of geodatabase
contents
Isgs_Gmdm_Map_Feature_Examples_[ver].pdf … Examples of map features
by feature class
Isgs_Gmdm_Data_Object_List_[ver].pdf … Short list of geodatabase
contents
Isgs_Gmdm_Data_Object_Desc_[ver].pdf … Detailed list of geodatabase
contents
Isgs_Gmdm_Field_Defs_Short_[ver].pdf … Short list of field
definitions
Isgs_Gmdm_Field_Defs_[ver].pdf … Detailed list of field
definitions
Isgs_Gmdm_Domain_Defs_[ver].pdf … Domain definitions
Note: [ver] = version number of the ISGS geologic map data model (GMDM) that was current when the files were created.
Technical Requirements
The data are intended for use with GIS software. The ISGS uses ESRI
ArcGIS software, however, ESRI formats can be imported into many
different GIS software packages. It is expected that customers who
obtain these data have the technical expertise to use GIS software. Th
ISGS does not provide software support of any kind.
The ArcReader file (*.pmf) provides an interactive map that can be used to browse the data. It requires ArcReader 9.3, which can be downloaded free of charge from www.esri.com.
Updated 10/5/2009 JKH
