SurDex Corporation 520 Spirit of St. Louis Blvd. Chesterfield, MO 63005 (636) 532-3427 http://www.surdex.com 20050114 2004 remote-sensing image Helena, Montana Montana State Library http://mslapps.mt.gov/Geographic_Information/Data/Aerial_Photos/helena_hrcolor_2004.aspx This data set was prepared for the City of Helena, Lewis and Clark County, and the U.S. Geological Survey by Surdex Corporation of Saint Louis, Missouri. It is an orthorectified mosiac of natural-color aerial photos from April 26, 2004. The horizontal resolution of the images are one foot. This data was originally provided to the State Library in UTM coordinates as TIFF images in UTM coordinates with a resolution of 0.3 meters. The Library converted the images to State Plane Coordinates and re-sampled the resolution to one foot (0.3048 meters). Digital images or aerial photographs were captured to support various governmental, municipal, tribal, and emergency management GIS activities. Orthorectified imagery products will be used to identify and collect geospatial information about structures, transportation, infrastructure, facilities and other information relative to multiple GIS applications. 20040426 ground condition Complete -112.27 -111.86 46.76 46.49 ISO 19115 Topic Category imageryBaseMapsEarthCover georeferenced mosaic DOQ digital ortho imagery digital orthophoto digital image map aerial photograph rectified photograph orthophoto orthoimage rectified image U.S. Department of Commerce, 1977, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions (Federal Information Processing Standard 10-3): Washington, D.C., National Institute of Standards and Technology. US U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of The United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology. MT None Users must assume responsibility to determine the usability of this data for their purposes. Detailed information on varying horizontal accuracy is provided to facilitate appropriate use of the raster digital information The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time. RJ Zimmer City of Helena and Lewis and Clark County, MT GIS Center Manager mailing and physical address

316 North Park Ave.

Helena MT 59624 406-447-8367 406-447-8386 RJZIMMER@co.lewis-clark.mt.us Rigorous QC procedures are applied during photographic acquisition and inspection to ensure minimal amounts of radiometric variability in images. A global color balance is performed on final mosaicked images. Slight radiometric differences may occur between adjacent orthoimages due to the following; source photography capture dates, times and sun angles of aerial photography along flight lines. Helena Fully Analytical Aerial Triangulation Report (FAAT) 2.03 See section 3.1 of FAAT Report No explicit vertical accuracy requirements apply to the orthophotos generated on this project. Surdex Corporation 20040426 remote-sensing image 1667 stable base material 20040426 ground condition Surdex Aerial Photography Imagery Source Surdex Corp Unpublished Material digital file 20040426 Elevation Data DEM Provides ground elevations for orthorectification process. DJ&A Unpublished Material 20040426 Control Data control ground control used to establish positions for reference and correlation purposes and as input to the aerotriangulation process. Control consists of both airborne GPS to provide camera station positions and photoidentifiable surveyed ground control for ground reference. U.S. Geological Survey 20021002 20021002 date of camera calibration associated with the source photography camera input camera calibration parameters The process description for the source information is detailed in the Analytical Aerial Triangulation report for Helena, MT. Any other process description regarding how the digital orthophoto data was produced can be obtained from Surdex Corporation. The complete processes used by Surdex contains sensitive business procedures that are proprietary to Surdex. Surdex is willing to release this information to interested parties provided a binding Non-Disclosure Agreement has been executed. 20041001 Surdex Organization Wade Williams Project Manager mailing and physical address

520 Spirit of St. Louis Blvd.

Chesterfield MO 63005 636-532-3427 636-537-9638 wadew@surdex.com raster Pixel 50720 56810 1 State Plane Coordinate System 2500 45.000 49.000 -109.500000 44.250000 60000.000 0.000 row and column 0.3048 0.3048 meters North American Datum of 1983 Geodetic Reference System 1980 6378137.000000 298.257222 Montana State Library mailing address

PO Box 201800

Helena MT 59620-1800 406-444-5354 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov geoinfo@mt.gov Downloadable Data The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time. MrSID Image http://mslapps.mt.gov/Geographic_Information/Data/Aerial_Photos/helena_hrcolor_2004.aspx 20140106 20130719 20130417 20041210 Edward D'Sousa Surdex Corporation Project Manager mailing and physical address

520 Spirit of St. Louis Blvd

Chesterfield MO 63005 636-532-3427 636-537-9638 dsousa@surdex.com FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 {4CBAB2A6-EFB5-4469-AB07-63491A2DE3FD}