This metadata references a comma-delimited file describing 492 digitized prints of large-format photographs from 160 viewpoints. The photographic images themselves are referenced in a separate metadata file entitled "Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889-2012". The viewpoints were first photographed by Stanton in 1889-1890, and then re-photographed in about 1989-1992 and 2010-2012. This set of photos focuses on change in riparian vegetation and partially overlaps a larger set of Stanton viewpoints re-photographed by Webb and others and available at http://wwwpaztcn.wr.usgs.gov/fscc/stanton-repeat-photography/index.php. The file of descriptive information gives viewpoint stake number, name, and river mile, and documents occurrence of the exotic shrub Tamarix ramosissima, changes in cover of native and invasive woody riparian vegetation, occurrence of Diorhabda spp., the beetle introduced to control Tamarix, reductions in cover of native Prosopis glandulosa, changes in cover of vegetation in the old high-water zone, occurrence of the native shrubs Baccharis spp., Salix exigua, Pluchea sericea, Acacia greggii, and additional notes.

The dataset includes 492 digitized prints of large-format photographs from 160 viewpoints. A separate metadata file "Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889-2012" describes a comma-delimited file of descriptive information. The viewpoints were first photographed by Stanton in 1889, and then re-photographed in about 1991, 2010 and sometimes other years. This set of photos focuses on change in riparian vegetation and partially overlaps a larger set of Stanton viewpoints re-photographed by Webb and others and available at http://wwwpaztcn.wr.usgs.gov/fscc/stanton-repeat-photography/index.php. The file of descriptive information gives viewpoint stake number, name, and river mile, and documents occurrence of the exotic shrub Tamarix ramosissima, changes in cover of native and invasive woody riparian vegetation, occurrence of Diorhabda spp., the beetle introduced to control Tamarix, reductions in cover of native Prosopis glandulosa, changes in cover of vegetation in the old high-water zone, occurrence of the native shrubs Baccharis spp., Salix exigua, Pluchea sericea, Acacia greggii, and additional notes.

The dataset includes 492 digitized prints of large-format photographs from 160 viewpoints. A separate metadata file "Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889-2012" describes a comma-delimited file of descriptive information. The viewpoints were first photographed by Stanton in 1889, and then re-photographed in about 1991, 2010 and sometimes other years. This set of photos focuses on change in riparian vegetation and partially overlaps a larger set of Stanton viewpoints re-photographed by Webb and others and available at http://wwwpaztcn.wr.usgs.gov/fscc/stanton-repeat-photography/index.php. The file of descriptive information gives viewpoint stake number, name, and river mile, and documents occurrence of the exotic shrub Tamarix ramosissima, changes in cover of native and invasive woody riparian vegetation, occurrence of Diorhabda spp., the beetle introduced to control Tamarix, reductions in cover of native Prosopis glandulosa, changes in cover of vegetation in the old high-water zone, occurrence of the native shrubs Baccharis spp., Salix exigua, Pluchea sericea, Acacia greggii, and additional notes.

The viewpoints were first photographed by Stanton in 1889, and then re-photographed in about 1991, 2010 and sometimes other years. This set of photos focuses on change in riparian vegetation and partially overlaps a larger set of Stanton viewpoints re-photographed by Webb and others and available at http://wwwpaztcn.wr.usgs.gov/fscc/stanton-repeat-photography/index.php. The file of descriptive information gives viewpoint stake number, name, and river mile, and documents occurrence of the exotic shrub Tamarix ramosissima, changes in cover of native and invasive woody riparian vegetation, occurrence of Diorhabda spp., the beetle introduced to control Tamarix, reductions in cover of native Prosopis glandulosa, changes in cover of vegetation in the old high-water zone, occurrence of the native shrubs Baccharis spp., Salix exigua, Pluchea sericea, Acacia greggii, and additional notes.

The viewpoints were first photographed by Stanton in 1889, and then re-photographed in about 1991, 2010 and sometimes other years. This set of photos focuses on change in riparian vegetation and partially overlaps a larger set of Stanton viewpoints re-photographed by Webb and others and available at http://wwwpaztcn.wr.usgs.gov/fscc/stanton-repeat-photography/index.php. The file of descriptive information gives viewpoint stake number, name, and river mile, and documents occurrence of the exotic shrub Tamarix ramosissima, changes in cover of native and invasive woody riparian vegetation, occurrence of Diorhabda spp., the beetle introduced to control Tamarix, reductions in cover of native Prosopis glandulosa, changes in cover of vegetation in the old high-water zone, occurrence of the native shrubs Baccharis spp., Salix exigua, Pluchea sericea, Acacia greggii, and additional notes.

The USGS Southwest Repeat Photography Collection (‘Collection’), formerly named the Desert Laboratory Repeat Photography Collection, is now housed by the Southwest Biological Science Center (SBSC) in Flagstaff, Arizona. It contains images from the late 1800s to mid-2000s, and was assembled over decades by now retired USGS scientists Drs. Robert H. Webb and Raymond M. Turner. There are 80 camera points, or stakes, along Kanab Creek in the Collection, with images and fields notes taken between 1872 and 2010 (a 138-year span). About one-fourth of the Kanab Creek film had been previously digitized, but none of the associated materials, including field notes, were digitized. The goal of the Fiscal Year (FY) 2016 Kanab Creek data preservation project was to preserve all film and materials for the Kanab Creek stretch, which represents a small subset of the entire USGS Southwest Repeat Photography Collection. For the purposes of this project, we will be using assessments made during the digital preservation of this subset in order to estimate the time and protocols necessary to digitize and release the entire Collection, thus using this project as an example to model the preservation efforts for the rest of the Collection. As the Collection was compiled, every camera point or stake location (‘stake’) was assigned a stake number denoted by the letter ‘s’ in front of a number (e.g., s1234). It is important to note that since images were taken by various repeat photography expeditions at different times and for different research purposes, stake numbers do not follow a logical numerical or geographical order. Each stake has a physical folder where all materials collected over time have been consolidated, with the exception of film. The folders contain print photographs, field notes, Record of Repeat Photography note sheets and other paper materials. The photographic film (negative and positive) is stored within archival envelopes within fire safes at SBSC for security. The goal of this preservation project was to digitize the best quality film and other materials for each date at all stakes along Kanab Creek in order to preserve the long term visual record. The digitization process was slightly different depending on the type of material; all processes were documented and a detailed protocol has been provided as an attachment on the ScienceBase page. Geospatial data are also included in this release to provide users with a map representation of where the stake locations are situated along Kanab Creek. This data release contains 80 child items, each representing a different stake location along Kanab Creek. Each child item provides digital copies of images and field notes from all photographed years at each stake, and has an associated metadata record that describes the contents of the page. This main landing page includes all child items, geospatial references for all stake locations (SHP file), a spreadsheet with supplemental information for each stake (CSV file), a project level metadata record, a metadata record that describes both the SHP file and the CSV, and a document describing the scanning protocols used for this project. Description of film materials: Film is ideal for preservation at a high resolution because it is the closest representation of the source image captured by the camera. The images in this release include digital scans of 182 film negatives or prints. Most of these are from distinct stake locations and dates, however there are some duplicates (from the same stake and date) that were scanned in order to preserve unique details they included. The film types vary depending on the time of data collection and type of camera used. The film types include black and white negatives, black and white positives, color negatives and color positives, and are found in either 4x5" size or 120mm film size. To digitize all film types we used a Hasselblad Flextight scanner with associated FlexLight software. To edit film we used a

The USGS Southwest Repeat Photography Collection (‘Collection’), formerly named the Desert Laboratory Repeat Photography Collection, is now housed by the Southwest Biological Science Center (SBSC) in Flagstaff, Arizona. It contains images from the late 1800s to mid-2000s, and was assembled over decades by now retired USGS scientists Drs. Robert H. Webb and Raymond M. Turner. There are 80 camera points, or stakes, along Kanab Creek in the Collection, with images and fields notes taken between 1872 and 2010 (a 138-year span). About one-fourth of the Kanab Creek film had been previously digitized, but none of the associated materials, including field notes, were digitized. The goal of the Fiscal Year (FY) 2016 Kanab Creek data preservation project was to preserve all film and materials for the Kanab Creek stretch, which represents a small subset of the entire USGS Southwest Repeat Photography Collection. For the purposes of this project, we will be using assessments made during the digital preservation of this subset in order to estimate the time and protocols necessary to digitize and release the entire Collection, thus using this project as an example to model the preservation efforts for the rest of the Collection. As the Collection was compiled, every camera point or stake location (‘stake’) was assigned a stake number denoted by the letter ‘s’ in front of a number (e.g., s1234). It is important to note that since images were taken by various repeat photography expeditions at different times and for different research purposes, stake numbers do not follow a logical numerical or geographical order. Each stake has a physical folder where all materials collected over time have been consolidated, with the exception of film. The folders contain print photographs, field notes, Record of Repeat Photography note sheets and other paper materials. The photographic film (negative and positive) is stored within archival envelopes within fire safes at SBSC for security. The goal of this preservation project was to digitize the best quality film and other materials for each date at all stakes along Kanab Creek in order to preserve the long term visual record. The digitization process was slightly different depending on the type of material; all processes were documented and a detailed protocol has been provided as an attachment on the ScienceBase page. Geospatial data are also included in this release to provide users with a map representation of where the stake locations are situated along Kanab Creek. This data release contains 80 child items, each representing a different stake location along Kanab Creek. Each child item provides digital copies of images and field notes from all photographed years at each stake, and has an associated metadata record that describes the contents of the page. This main landing page includes all child items, geospatial references for all stake locations (SHP file), a spreadsheet with supplemental information for each stake (CSV file), a project level metadata record, a metadata record that describes both the SHP file and the CSV, and a document describing the scanning protocols used for this project. Description of film materials: Film is ideal for preservation at a high resolution because it is the closest representation of the source image captured by the camera. The images in this release include digital scans of 182 film negatives or prints. Most of these are from distinct stake locations and dates, however there are some duplicates (from the same stake and date) that were scanned in order to preserve unique details they included. The film types vary depending on the time of data collection and type of camera used. The film types include black and white negatives, black and white positives, color negatives and color positives, and are found in either 4x5" size or 120mm film size. To digitize all film types we used a Hasselblad Flextight scanner with associated FlexLight software. To edit film we used a

This dataset comprises georectified and tonally balanced aerial photographs collected in 1930 by the U.S. Bureau of Reclamation along a portion of the floodplain of the Colorado River in Palo Verde Valley, Arizona and California.

These data are classification maps of total riparian vegetation along the Colorado River in Grand Canyon from Glen Canyon Dam to Pearce Ferry in Arizona. The data are derived from interpretation of multispectral high resolution airborne imagery that was acquired in May 2013. The total vegetation data have the same 0.2-meter ground resolution as the imagery. These data have not undergone a statistical accuracy assessment, but they are based on methods that included image interpretation to exhaustively identify total vegetation which have been shown to produce very high classification accuracies and excellent correlation between maps of total vegetation produced by independent analysts and ground truth. The data represent total vegetation that is primarily green and photosynthetically active at the time of image acquisition, and do not necessarily represent vegetation at various stages of senescence or defoliated/dead vegetation that may still be rooted and standing.

These data are classification maps of total riparian vegetation along the Colorado River in Grand Canyon from Glen Canyon Dam to Pearce Ferry in Arizona. The data are derived from interpretation of multispectral high resolution airborne imagery that was acquired in May 2013. The total vegetation data have the same 0.2-meter ground resolution as the imagery. These data have not undergone a statistical accuracy assessment, but they are based on methods that included image interpretation to exhaustively identify total vegetation which have been shown to produce very high classification accuracies and excellent correlation between maps of total vegetation produced by independent analysts and ground truth. The data represent total vegetation that is primarily green and photosynthetically active at the time of image acquisition, and do not necessarily represent vegetation at various stages of senescence or defoliated/dead vegetation that may still be rooted and standing.