Larsen, J.C. Assmus, K.C. Causey, J.D. Zientek, M.L. 2004 raster digital data U.S. Geological Survey Data Series DS 106 Menlo Park, CA U.S. Geological Survey This is the eastern half of the originally published map sheet. This rectified map image was created for the purpose of directly comparing an image of the original geologic map with other geospatial information. The rectified image includes the map and coordinate labels; titles, text, explanations, cross sections, and collar information were cropped. This rectified image was created to allow the direct comparison of a published geologic map with other geospatial information in a geographic information system. The rectified image can be compared to vector representations of the same map to ensure that features are coded correctly and that all geologic information on the published map was captured in the vector files. The image also quickly illustrates how the author intended to symbolize the map. HelenaNF_E_rect.sid is a rectified (georeferenced) MrSID image format file that was derived from an unpublished rectified TIFF image format file which, in turn, was created by scanning a paper copy of the original map by Tysdal (1996). The map sheet was too large to pass through the scanner. It was divided into two parts that were scanned separately. This image is for the eastern part of the map sheet. 1996 Publication date of original map Complete None planned -111.995681 -110.941694 46.956098 46.088617 424232.614260 504436.503165 5200066.949660 5104142.383585 None geologic map rectified raster image digital image georeferenced image Helena National Forest Montana USA none This digital image is not meant to be used or displayed at any scale larger than 1:250,000 (for example, 1:2,000). Michael L. Zientek U.S. Geological Survey Geologist mailing and physical address

904 W. Riverside, Room 202

Spokane WA 99201-1087 (509) 368-3105 mzientek@usgs.gov N/A Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcGIS 8.1; Adobe Photoshop Elements 2.0; LizardTech Geospatial Encoder 1.4; 3001, Inc. RAster Georeference Enabler (RAGE) tool 1.1.17. Raster Dataset The title, text, explanation, cross section, index maps and collar information of the original data source map are cropped or partially cropped in the georeferenced MrSID image. HelenaNF_E_rect.sid was tested to ensure it was projected and georeferenced properly by overlying it with a rectified digital raster graphic (DRG) of the map area. At the scale of the publication, reference points on the image coincided with corresponding reference points on the DRG. N/A Tysdal, R.G., comp. 1996 map Plate 1 Tysdal, R.G. (ed.) Ludington, Steve (ed.) McCafferty, A. E. (ed.) 1996 U.S. Geological Survey Open-File Report 96-0683-A Reston, VA U.S. Geological Survey 250000 paper 1996 publication date Tysdal (1996) The full map extent of the original paper map and marginal coordinate information, excluding the title, explanation, cross-sections, index maps, and other collar information, was used in this data set. Even though Tysdal's (1996) geologic map was published at a scale of 1:126,720, the geology was actually mapped on a 1:250,000-scale topographic map base that had been enlarged to 1:126,720. Thus the resolution of the mapping is only as good as the base map component. The original paper map was cut into two pieces so that it would fit in the scanner. The eastern half was scanned and saved as a 400 dpi, 8-bit gray scale TIFF image using a Colscan scanner at the TeckCominco Spokane Office. The scanned TIFF image was cropped to include the map and marginal coordinate information. A geoTIFF digital raster graphic (DRG) image of the White Sulphur Spring 1:250,000-scale quadrangle was used to rectify the TIFF. Latitude and longitude intersections displayed on the TIFF image were tied to their respective latitude and longitude intersections on the White Sulphur Spring DRG. The rectified TIFF was then opened in LizardTech Geospatial Encoder 1.4 and converted to MrSID image format using a 10:1 compression ratio. The resulting files include the image data (*.sid) and a world file (*.sdw). ArcGIS did not recognize coordinate information for these files, so 3001, Inc.'s RAster Georeference Enabler (RAGE) tool was used to associate coordinate information with the MrSID image. The RAGE tool is available from URL = http://www.3001data.com/3001website/main/downloads_files/rage/geotiff_header_repair.htm. 2003 Tysdal (1996)HelenaNF_E_rect.sid Raster Pixel 11807 9872 1 1 8 FALSE Wavelet pixel codes MrSID Upper Left TRUE 8.124381 8.124381 Universal Transverse Mercator 12 0.999600 -111.000000 0.000000 500000.000000 0.000000 row and column 8.124381 8.124381 meters North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 GCS_North_American_1927 NAD_1927_UTM_Zone_12N Band_1 256 Table ObjectID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. 0 ObjectID OID 0 4 Value 0 Value Integer 0 0 Count 0 Count Integer 0 0 Band_2 ObjectID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Value Count Band_3 ObjectID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Value Count U.S. Geological Survey, Spokane Field Office Michael L. Zientek mailing and physical address

904 W. Riverside, Room 202

Spokane WA 99201-1087 (509) 368-3105 mzientek@usgs.gov DS 106 The U.S. Geological Survey (USGS) provides these geographic data "as is". The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS 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 USGS. This digital geologic map image is not meant to be used or displayed at any scale larger than 1:250,000 (for example, 1:2,000). MrSID 1.4 The SID file contains the image data. The SDW file contains the world file. The AUX file contains auxiliary information such as map projection, pointer to pyramid file, etc. The XML file contains the metadata describing the data set <data set name>.sid.xml. MrSID 7.832 7.832 N/A Software that supports MrSID image format is required to use this data. 20040915 Jeremy C. Larsen Information Systems Support (under contract to the U.S. Geological Survey) Contractor mailing and physical address

904 W. Riverside, Room 202

Spokane WA 99201 (509) 368-3118 jlarsen@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time none none http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 -111.995681 -110.941694 46.956098 46.088617 1 HelenaNF_E_rect.sid 424232.61426 5200066.94966 5104142.383585 504436.503165 1 002 Local Area Network file://\\Qsnap1\HWTRS\HW_RegionalGeology\Map_Images_Final\Report_working\OF04-xxx\GEOREFERENCED\HelenaNF_E_rect.sid 7.832 Raster Dataset {18EF70DE-1241-4F84-A526-B953D94855A0} 20040915 09292700 20040811 FALSE 13360300 20030917 14375300 20040915 dataset ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 NAD_1927_UTM_Zone_12N 2 1 8.124381 9872 8.124381 11807