USGS Geoscience Data Catalog
Additional USGS Geoscience data can be found by geographic location or by publication series.
U.S. Geological Survey Central Region Energy Resources Team, 2002, Elevation of the Danville Coal in Indiana: U.S. Geological Survey Professional Paper 1625-D, U.S. Geological Survey, Denver, Colorado.This is part of the following larger work.
(ed.), J.R. Hatch , and (ed.), R.H. Affolter , 2002, Resource Assessment of the Springfield, Herrin, and Danville and Baker Coals in the Illinois Basin: U.S. Geological Survey Professional Paper 1625-D, U.S. Geological Survey, Denver, Colorado.This is part of the following larger work.
U.S. Geological Survey, 2002, National Coal Resource Assessment: U.S. Geological Survey Professional Paper 1625, U.S. Geological Survey, Denver, Colorado.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .0001. Longitudes are given to the nearest .0001. Latitude and longitude values are specified in Decimal Degrees.
The horizontal datum used is North American Datum 1927.
The ellipsoid used is CLARKE1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
| Range of values | |
|---|---|
| Minimum: | -410 |
| Maximum: | 610 |
| Range of values | |
|---|---|
| Minimum: | -400 |
| Maximum: | 620 |
| Range of values | |
|---|---|
| Minimum: | -420 |
| Maximum: | 600 |
Character field
812-855-5805 (voice)
812-855-2862 (FAX)
cconolly@pyrite.igs.indiana.edu
This ARC/INFO polygon coverage of the elevation of the top of the Danville Coal in Indiana was created as part of the USGS's National Coal Assessment.
Carol L. Conolly, Indiana Geological Survey, Unpublished material, springca.mdb = Microsoft Access database of point-source coal stratigraphic information.
STEP 1. CREATE A GRID OF DANVILLE ELEVATION (200 METER RESOLUTION) FROM THE POINT DATA: topogrid da_elvgrd 200 boundary da_mask datatype spot point da_elvpt da_elvft enforce off end STEP 2. CONTOUR THE GRID AT 20-FT. CONTOUR INTERVAL TO GET THE CONTOUR LINES: latticecontour da_elvgrd da_elvtg20 20 0 da_elev_ft STEP 3. IN ARCEDIT, ADD THE DANVILLE CROPLINE TO THE CONTOUR LINES TO MAKE A POLYGON COVERAGE OF DANVILLE ELEVATION; CLEAN THE POLYGON COVERAGE WITH NODUPS OPTION SO THAT EACH POLYGON HAS ONLY 1 LABEL; CHECK FOR AND REMOVE DANGLE NODES. STEP 4. IN GRID, RUN RECLASS ON THE ORIGINAL DANVILLE ELEVATION GRID TO CREATE A GRID THAT CAN BE USED TO LABEL POLYGONS WITH ELEVATION VALUES: da_elvgrdrc = reclass(da_elvgrd, da_elev_reclass.txt, nodata) STEP 5. USE THE AML "LABEL-ELEV-POLY.AML" TO LABEL THE POLYGONS WITH THE ELEVATION VALUES. HERE IS A DESCRIPTION OF THE AML: /* label-elev-poly.aml /* /* This aml was written by Alex Zlotin. /* The aml uses a polygon coverage and a grid (&args cov grd) as input. /* For example, a grid of coal elevation and a the polygon coverage /* of coal elevation that was created by running latticecontour /* on the coal elevation grid. Since the output of latticecontour /* is arcs, the polygon coverage that is created from these arcs will /* not have coal elevation values. /* /* This aml gets the value in the grid cell that is located /* at the polygon label for each polygon in the polygon coverage. /* This grid cell value is used to assign values to the polygons /* in the polygon coverage. /* use this aml to update the values of an item called elev in /* the .pat of a polygon coverage /* /* before using this aml, remember: /* cov = input polygon coverage; should have x-coord and y-coord in /* cov.pat, if not, do addxy cov /* cov should not have duplicate polygon labels (build nodups in Arcedit) /* cov should not have an item named elev in cov.pat, the program adds /* this item example of how to use this aml at the Arc: prompt: &run label-elev-poly.aml polygon_coverage grid STEP 6. USE ARCVIEW TO VISUALLY CHECK THE POLYGON COVERAGE FOR CORRECT ELEVATION VALUES. STEP 7. PROJECT THE COVERAGE FROM UTM TO GEOGRAPHIC USING THE PROJECT COMMAND WITH FOLLOWING PROJECTION FILE: input projection utm units meters zone 16 parameters output projection geographic units dd parameters end
Person who carried out this activity:
812-855-5805 (voice)
812-855-2862 (FAX)
cconolly@pyrite.igs.indiana.edu
A total of 5,952 data points of Danville elevation (5,247 public data points + 705 confidential data points) covering southwest Indiana and adjacent areas of Illinois and Kentucky were used to create the 20-foot contours. Accuracy of this compilation is dependent on the locational and measurement accuracy of the original data points, the distribution of the data points, the local variability of the coal seam, and other factors. In order to check polygons for correct elevation values, an overlay of the elevation data points and the elevation polygon coverage was created in ArcView, with the data points and polygons color-coded according to elevation value (e.g. red colored polygons should contain red data points), and the resulting map was visually checked; no errors were found.
An overlay of sp_thk and IGS digital base maps was created in ArcView, and the resulting map was visually checked to ensure that state boundary lines in both maps were coincident.
Accuracy of Danville Coal elevation values varies depending upon the source of the original data. Some data points (core holes and geophysical logs) have surveyed locations and elevations, with a vertical accuracy of approx. +or- 1ft. Other data, (some coal drilling records) have a veritcal accuracy of +or- 10 feet.
Areas for which Danville elevation data points are few or lacking are:
northwest Pike County, and southeast Knox County, Indiana.
Polygon and chain-node topology are present. The coverage was checked for complete polygon and chain-node topology (no dangling arcs), polygon labels (one per polygon, except for universal polygon), and boundary values appropriate for map projection and map units. Did not check for sliver polygons.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints: none
1-888-ASK-USGS (voice)
303-202-4693 (FAX)
ask@usgs.gov
USGS Professional Paper 1625-D
This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Although all data and software published on this CD-ROM are used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials.
| Data format: | Geographic features and attribute data in format ArcView shapefile (version 1.0) |
|---|---|
| Network links: |
<http://energy.cr.usgs.gov/coal/nca/> |
812-855-5805 (voice)
812-855-2862 (FAX)
cconolly@pyrite.igs.indiana.edu
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://geo-nsdi.er.usgs.gov/metadata/professional-paper/1625/d/In/Da/indaelv.faq.html
Page Contact Information: Peter Schweitzer
Page Last Modified: Monday, 10-Nov-2008 12:20:40 EST
