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<br />20 <br /> <br />test of very high resolution LiDAR within Marble Canyon, and the publication ofresults from <br />the remote sensing initiative, Several automated products were developed from the multi- <br />spectral imagery. These include: a canyon-wide fine-grained sediment inventory, a camping <br />beach characteristic inventory, and the development of digital topographic cross-sections (based <br />on the May, 2002 I-meter digital elevation model) to support hydrographic modeling, FY2004 <br />accomplishments will include: a detailed, canyon-wide vegetation map developed from the May, <br />2002 multi-spectral digital imagery; acquisition of canyon-wide multi-spectral and panchromatic <br />digital imagery (assuming available funds); and very high resolution LiDAR, hydrographic <br />LiDAR and selected multi-beam sonar to support a final assessment of these technologies as <br />primary core monitoring technologies, These data will form the basis of detailed inventories, <br />change analyses and technology assessments that will be produced in FY2004 and FY2005. <br />Terrestrial digital elevation base maps - Prior to 2001, GCMRC had sub-meter accuracy <br />terrestrial topographic maps of approximately 80 miles of the ecosystem in 17 areas of <br />concentrated scientific effort that have been referred to as GIS sites, GCMRC also has similar <br />topographic maps from GCD to Badger Rapid near river mile (RM) 8 derived from our LiDAR <br />evaluation in 1998, In FY2000, the GCMRC collected high-resolution orthophotography and <br />topography of the entire CRE, This dataset provides one-foot resolution geo-referenced and <br />rectified imagery and one meter interval contour maps as well as a four-meter digital elevation <br />model. This data set was delivered, inspected, and incorporated into the GCMRC FTP site <br />(accessible from the GCMRC web page or directly at ftp,gcmrc,gov) in the /data/orthophotos and <br />/data/lidar subdirectories, In addition to sub-meter terrestrial base maps described above, we <br />have high-resolution field surveys of 35 sand bar sites that have been repeated at varying <br />intervals since 1991. We also have numerous field surveys of vegetation, cultural, and <br />endangered species habitat such as KAS surveys, Additional sub-meter accuracy terrestrial <br />topographic coverage needs to be obtained for the remainder of the ecosystem, <br />Hvdrographic base maps - The hydrographic mapping program was established for the <br />purpose of producing a sub-aqueous channel map of the Colorado River within the ecosystem, <br />Hydrographic mapping supports several GCMRC scientific initiatives including: streamflow and <br />fine-grained sediment transport, fine-grained sediment storage, streamtlows and suspended <br />sediment modeling, advanced conceptual modeling of coarse grained sediment, fish habitat <br />mapping, and measuring changes in morphology and topography of the sub-aqueous canyon <br /> <br />GCMRC FY2005-2006 Draft Annual Work Plan (November 10, 2003) <br />