This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. Vegetation and land use were interpreted to as detailed a level possible from high-resolution, 9” x 9” stereo pairs of 1:12,000-scale true color aerial photography. Polygons representing vegetation or land use map classes were delineated directly on-screen through heads-up digitizing using ArcGIS editing tools and transferred to a spatial database. The project used the program standard minimum mapping unit of 0.5 ha with few exceptions.

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. Vegetation and land use were interpreted to as detailed a level as possible from high-resolution, 9” x 9” stereo pairs of 1:12,000-scale true color aerial photography. Polygons representing vegetation or land use map classes were delineated on Mylar overlays on aerial photographs (where signatures were confusing) and with the heads-up digitizing technique (where signatures had high contrast), then transferred to a spatial database. The project used the national program standard minimum mapping unit of 0.5 ha with few exceptions.

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. Photointerpreters delineated initial polygons through manual interpretation of 2003/2004 1:12,000-scale true color aerial photography supplemented by occasional computer screen digitizing on a mosaic of digitized aerial photos. These polygons were labeled with base map classes during photointerpretation. Field visits verified interpretation concepts.

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. Photointerpreters delineated initial polygons through manual interpretation of 2003/2004 1:12,000-scale true color aerial photography supplemented by occasional computer screen digitizing on a mosaic of digitized aerial photos. These polygons were labeled with base map classes during photointerpretation. Field visits verified interpretation concepts.

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. The project area is covered by 28 flight lines flown south to north for the 1:12,000 scale photography and 10 flight lines for the 1:40,000 scale photography. Some of the flight lines overlap with repeat flights due to elevation and scale considerations. A total of 1,412 color photographs were taken at 1:12,000 (1"=1,000') scale and 366 color photographs for the 1:40,000 (1" = 3,333') all printed on 9"x 9" paper stock. Overlap for all photographs was approximately 50-60% and sidelap between flight lines was approximately 20-30%. All photography was acquired between September 25 and October 3, 2001. Repeat dates were required due to the large area being acquired in addition to the challenging terrain. Airborne GPS was collected with a base station at the Fort Collins, Colorado Airport (Latitude: 40 26 58.07884; Longitude:-105 00 24.66076; Height:1509.710 m; Antenna ht:0.203 m). GPS points provided for a flight line point shape file and aided with the ortho-rectification process

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. The project area is covered by 28 flight lines flown south to north for the 1:12,000 scale photography and 10 flight lines for the 1:40,000 scale photography. Some of the flight lines overlap with repeat flights due to elevation and scale considerations. A total of 1,412 color photographs were taken at 1:12,000 (1"=1,000') scale and 366 color photographs for the 1:40,000 (1" = 3,333') all printed on 9"x 9" paper stock. Overlap for all photographs was approximately 50-60% and sidelap between flight lines was approximately 20-30%. All photography was acquired between September 25 and October 3, 2001. Repeat dates were required due to the large area being acquired in addition to the challenging terrain. Airborne GPS was collected with a base station at the Fort Collins, Colorado Airport (Latitude: 40 26 58.07884; Longitude:-105 00 24.66076; Height:1509.710 m; Antenna ht:0.203 m). GPS points provided for a flight line point shape file and aided with the ortho-rectification process

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. GRBA base map imagery included a 4-band, 1-meter resolution, 2007 Digital Globe product and a 4-band, 6-inch resolution product acquired in June and July 2007 by Digital Mapping, Inc. (DMI) for the Southern Nevada Water Authority. Interpretation and mapping of the vegetation began using a four step process involving: (1) preliminary image classification and segmentation, (2) photo-interpretation and digitizing, (3) ground-truthing of the mapped data, and (4) map refinement and finalization.

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here.

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here.

This reference contains the imagery data used in the completion of the baseline vegetation inventory project for the NPS park unit. Orthophotos, raw imagery, and scanned aerial photos are common files held here. The mapping component of the BLCA project used a combination of methods to interpret and delineate vegetation polygons. Initial line work was prepared by USBOR photointerpreters who delineated the most contrasting signatures, e.g., water bodies, exposed shoreline, unvegetated geology, land use types, and vegetation at the physiognomic level. The project photo interpreter used this baseline mapping and refined it by examining digital orthophotos in stereo. The stereo photography was used as needed to distinguish fine scale vegetation patterns. Ancillary datasets such as plot and observation point data and classification and local descriptions of plant associations were used by the photointerpreter to assist with map class definitions and manual delineations.