Process description: Using ESRI ArcGIS 9.2 software, an empty raster dataset was created and subequently populated with input rasters to create a statewide raster mosaic. The State of Connecticut, Department of Environmental Protection obtained these input rasters from the Tolland State Office of the NRCS at 344 Merrow Road, Suite A, Tolland, Connecticut 06084-3917.
STEP 1 - Create Raster Dataset - The Coordinate System for the raster dataset is NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet. The image compression type is JPEG with a compression quality of 90. The Pyramid Reference Point X and Y coordinate are 687800 and 1015180, respectively. Bands: 3. Pyramids: 8 Bilinear. The Pixel Type is 8_BIT_UNSIGNED, which supports index values from 0 to 255. Raster statistics were not built. Below is a record of the ESRI Geoprocessing CreateRasterDataset command and arguments that created the empty raster dataset.
CreateRasterDataset "Database Connections\10.18.8.94.depgisraster@DEP_Direct.sde" Ortho_2006_Color_Load # 8_BIT_UNSIGNED
PROJCS['NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet',
GEOGCS['GCS_North_American_1983',
DATUM['D_North_American_1983',
SPHEROID['GRS_1980',6378137.0,298.257222101]],
PRIMEM['Greenwich',0.0],
UNIT['Degree',0.0174532925199433]],
PROJECTION['Lambert_Conformal_Conic'],
PARAMETER['False_Easting',999999.999996],
PARAMETER['False_Northing',499999.999998],
PARAMETER['Central_Meridian',-72.75],
PARAMETER['Standard_Parallel_1',41.2],
PARAMETER['Standard_Parallel_2',41.86666666666667],
PARAMETER['Latitude_Of_Origin',40.83333333333334],
UNIT['Foot_US',0.3048006096012192]]
3 DEPRASTER "PYRAMIDS 8 BILINEAR" "128 128" "JPEG 90" "687800 1015180" "Database Connections\10.18.8.94.depgisraster@DEP_Direct.sde\depgisraster.DEP.Ortho_2006_Color"\
STEP 2 - Mosaic 410 of 411 quarter quadrangle input rasters that cover Connecticut. Due to poor image quality, one quarter quad, Amenia SE (n_4107312_se_18_1_20060731_20070319.tif), was not included in the statewide mosaic. The Ignore Background Value was set to one (1). The NoData value was left blank. The Mosaicking Tolerance value was set to zero (0). Consequently, pixel values in the raster mosaic resulted from a resampling of pixels values from individual input rasters due to the difference in alignment of input and mosaic (target) pixels. Note, in the resulting mosaic, the input rasters in NAD 1983 UTM Zone 18N Meters and NAD 1983 UTM Zone 19N Meters were projected to NAD 1983 StatePlane Connecticut FIPS 0600 Feet. Below is an example usage of the ESRI Geoprocessing Mosaic command and arguments used to mosaic 8 (quarter quadrangle) input rasters in TIFF format.
Mosaic D:\tif_fomat\42073\n_4207361_se_18_1_20060716_20070201.tif
D:\tif_fomat\42073\n_4207361_sw_18_1_20060716_20070201.tif; D:\tif_fomat\42073\n_4207362_se_18_1_20060805_20070201.tif; D:\tif_fomat\42073\n_4207362_sw_18_1_20060805_20070201.tif; D:\tif_fomat\42073\n_4207363_se_18_1_20060814_20070201.tif; D:\tif_fomat\42073\n_4207363_sw_18_1_20060814_20070201.tif; D:\tif_fomat\42073\n_4207364_se_18_1_20060814_20070201.tif; D:\tif_fomat\42073\n_4207364_sw_18_1_20060814_20070201.tif "Database Connections\depdbs11.depgisraster@DEP.sde \DEPGISRASTER.DEP.ORTHO_2006_COLOR_LOAD"
LAST FIRST 1 # NONE 0
"Database Connections\depdbs11.depgisraster@DEP.sde \DEPGISRASTER.DEP.ORTHO_2006_COLOR_LOAD"