BEGIN_USGS_DOQ_HEADER QUADRANGLE_NAME "HELENA" QUADRANT NE NORTH_LATITUDE 46 37 30.000 WEST_LONGITUDE -112 03 45.000 SOUTH_LATITUDE 46 33 45.000 EAST_LONGITUDE -112 00 00.000 PRODUCTION_DATE 1999 01 01 RASTER_ORDER LEFT_RIGHT/TOP_BOTTOM BAND_ORGANIZATION "SINGLE FILE" BAND_CONTENT BLACK&WHITE BITS_PER_PIXEL 8 SAMPLES_AND_LINES 5550 7650 HORIZONTAL_DATUM NAD83 HORIZONTAL_COORDINATE_SYSTEM UTM COORDINATE_ZONE 12 HORIZONTAL_UNITS METERS HORIZONTAL_RESOLUTION 1.000 SECONDARY_HORIZONTAL_DATUM NAD27 XY_ORIGIN 418200.000 5164350.000 SECONDARY_XY_ORIGIN 418261.412 5164138.015 NATION US STATE MT NW_QUAD_CORNER_XY 418659.656 5164041.325 NE_QUAD_CORNER_XY 423444.355 5163978.721 SE_QUAD_CORNER_XY 423356.286 5157033.876 SW_QUAD_CORNER_XY 418566.083 5157096.487 SECONDARY_NW_QUAD_XY 418657.169 5163822.993 SECONDARY_NE_QUAD_XY 423442.014 5163760.387 SECONDARY_SE_QUAD_XY 423353.946 5156815.576 SECONDARY_SW_QUAD_XY 418563.596 5156878.189 RMSE_XY 1.220 IMAGE_SOURCE "BLACK AND WHITE FILM" SOURCE_IMAGE_ID "NAPP 8388 34" SOURCE_IMAGE_DATE 1995 08 09 SOURCE_DEM_DATE 1998 01 01 AGENCY "WESTERN MAPPING CENTER (WMC)" PRODUCER "ANALYTICAL SURVEYS INC." PRODUCTION_SYSTEM "ORBIT OR_RECTIFY V.5.2" STANDARD_VERSION 1996 12 METADATA_DATE 1999 01 06 DATA_FILE_SIZE 42463050 BYTE_COUNT 5550