{"action":"create","ckan_id":null,"date_created":"Tue, 02 Sep 2025 02:21:47 GMT","date_finished":null,"harvest_job_id":"e41ada15-5ac1-489e-84b2-8d267350a687","harvest_source_id":"f4c7bbab-c7ef-4277-a7d3-c25b78854814","id":"2bef96a2-52e2-4214-959e-0638b5fba6a2","identifier":"https://dggs.alaska.gov/webpubs/metadata/DDS7.xml","parent_identifier":null,"source_hash":"1184592ac2b303227e231fa56d5b0b0d05b15766dbffb91e14dcfddabf309a81","source_raw":"\n\n\n\n\nDGGS Staff\n2014\nAlaska Coastal Profile Tool (ACPT)\ndelimited text files\n\nDigital Data Series\nDDS 7\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://dx.doi.org/10.14509/27359\nhttp://maps.dggs.alaska.gov/acpt/\n\n\n\nElevation profiles are a type of temporal data that can be used to understand coastal environments, document change and assess vulnerability. The value of these shore-normal measurements increases when sites are revisited seasonally and/or interannually due to the dynamic range of coastal landforms. These static measurements of the shoreface have been collected by a number of stakeholders in Alaska since the 1960s, but, have not historically been published or readily accessible. In cooperation with the Alaska Ocean Observing System, the Alaska Division of Geological & Geophysical Surveys (DGGS) has designed a universal repository to house these coastal measurements. This new database has an interactive map interface that enables easy access to existing profile locations to encourage repeat observations. The database has been designed to accommodate data sets collected with differing techniques, including differential leveling, survey-grade GPS or extraction from digital elevation models. Non-DGGS profile measurements, including community-led efforts, and data sets from state, federal and academic partners have also been incorporated into the database. Contributions from other entities are welcomed. The readily-accessible nature of this database is intended to promote partner and local involvement in community-based coastal monitoring.\nThis data set was created as a means to organize and provide public access to spatial data sets within the state of Alaska's coastal zone.\n\nThe DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as \"layers,\" group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the \"Entity_and_Attribute_Information\" section. Data layer contents:\n>Alaska Coastal Elevation Profiles: The data are downloadable as location-specific distribution packages. Within each package are delimited tabular files that contain the profile elevation data. Each file represents measurements from a specific point in time, organized by year and month.\n\n\n\n\n\n2014\n\n\nground condition at the date specified within the data set\n\n\nplanned\nas needed\n\n\n\n173\n-130\n72\n53\n\n\n\n\nISO 19115 Topic Category\ngeoscientificInformation\n\n\nAlaska Division of Geological & Geophysical Surveys\nCoastal Erosion\nCoastal and River\nGeologic Hazards\nHazards\nSea Level Changes\nSea Level Rise\n\n\nThis report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).\nAny hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nGIS Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5020\ndggsgis@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nFunding to develop this data set was provided, in part, by the Alaska Ocean Observing System. This work was also funded, in part, with qualified outer continental shelf oil and gas revenues through the Coastal Impact Assistance Program, U.S. Fish and Wildlife Service, U.S. Department of the Interior. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government.\n\n\nNational Marine Fisheries Service, National Oceanic and Atmospheric Administration.\n2014\nAlaska Shore Station Database\nhttps://alaskafisheries.noaa.gov/habitat/shorestation/default.htm\n\n\n\n\n\nDGGS staff have performed visual qualitative assessment to ensure consistency.\n\nnot applicable\nGaps in profile data exist when DGPS points failed to post-process. This is generally due to receiver malfunction or a low number of observed satellites. These gaps are typically apparent as unsampled sections when viewing the profile elevation data.\n\n\nHorizontal point location accuracy is highly dependent on the method of data collection. For DGPS data, the horizontal accuracies are presented as the Root Mean Square (RMS) error of the post-processed positions (typically lower than 10cm). For DEM-derived profile elevation data, the horizontal positional accuracy is dependent upon the ground-spacing of the point data. For elevation profiles obtained with various types of differential leveling techniques, the geographic accuracy of the entire profile location (approximately 10 cm to 1 km) is much poorer than the relative horizontal accuracy of the individual elevation points along each profile. Every effort has been made to infer appropriate horizontal accuracies for these varying methodologies based on all available information associated with the original data set.\n\n\nVertical point location accuracy is highly dependent on the method of data collection. For DGPS data, the vertical accuracies are presented as the Root Mean Square (RMS) error of the post-processed positions (typically lower than 10 cm). For DEM-derived profile elevation data, the vertical positional accuracy is dependent upon the reported vertical accuracy of the underlying data source. For elevation profiles obtained with various types of differential leveling techniques, the vertical accuracy of the entire profile location (approximately 10 cm to 1 m) is much poorer than the relative horizontal accuracy of the individual elevation points along each profile. Every effort has been made to infer appropriate vertical accuracies for these varying methodologies based on all available information associated with the original data set\n\n\n\n\n\n\nBuscombe, D.\nRubin, D.M.\nWarrick, J.A.\n2010\nA universal approximation of grain size from images of noncohesive sediment\n\nJournal of Geophysical Research\n115, 17\n\n\nUSA\nAmerican Geophysical Union\n\n\n\npaper\n\n\n\n2010\n\n\npublication date\n\nBuscombe, D., Rubin, D.M., and Warrick, J.A., 2010\nDescription of method used to determine grainsize approximation based on image autocorrelation techniques\n\n\n\n\nEmery, K.O.\n1961\nA simple method of measuring beach profiles\n\nLimnology and Oceanography\nv. 6, p. 90-93\n\n\nUSA\nAssociation for the Sciences of Limnology and Oceanography\n\n\n\npaper\n\n\n\n1961\n\n\npublication date\n\nEmery, K.O., 1961\nDescription of the'Emery Rod' differential leveling method that may be used to determine coastal elevation measurements.\n\n\nInitial data compilation - This database was initiated with coastal elevation profiles compiled from a range of original measurements, both published and unpublished, in the Alaska coastal zone. DGGS field measurements are collected with a survey-grade Differential Global Positioning System (DGPS) and either post-processed against a static base station or positions are calculated with real-time kinematic (RTK) methods in conjunction with a published or known control point. Data derived from digital elevation model (DEM) surfaces have been extracted along established profile locations at intervals of 1 m in ArcGIS. Additional field information for the survey data was manually added to the data set using ArcGIS. All positional information has been transformed into the WGS84 horizontal datum for use in interactive, online mapping applications. All data sets are visually checked for qualitative positional consistency.\nBuscombe, D., Rubin, D.M., and Warrick, J.A., 2010\nEmery, K.O., 1961\n2014\n\n\nDatabase development - In cooperation with the Alaska Ocean Observing System, the Alaska Division of Geological & Geophysical Surveys (DGGS) designed a universal repository to house these coastal measurements. The database has an interactive map interface that enables easy access to existing profile locations. The database was designed to accommodate data sets collected with differing techniques, including differential leveling, survey-grade GPS or extraction from digital elevation models. The readily-accessible nature of this database is intended to promote partner and local involvement in community-based coastal monitoring and we anticipate that the database will be periodically updated as additional data becomes available.\n2014\n\n\n\n\npoint\n\n\n\n\n0.00000001\n0.0000001\ndecimal degrees\n\n\nWorld Geodetic System of 1984\nWGS84\n6378137\n298.257223563\n\n\n\n\n\n\nAREA_YEAR_MO\nDelimited text files containing tabulated positional and elevation data points organized in shore-normal lines and grouped by location. Each data set contains fields to describe the time, method and original spatial reference frame of collection. Collector names and affiliations for each data set are included along with field notes, observations and/or grainsize measurements, where available.\nAlaska Division of Geological & Geophysical Surveys\nAREA_YEAR_MO\n\n\nLocation\nCommunity or area of the point\nAlaska Division of Geological & Geophysical Surveys\n\nIn most cases the location value will be the name of the nearest community, however, other geographic feature or regional names may also be used.\n\n\n\nYear\nYear that the point was measured\nAlaska Division of Geological & Geophysical Surveys staff and/or originating data source\n\nStatic measurements of the shoreface have been collected by a number of stakeholders in Alaska since the 1960s. This database is designed to present both modern and historic measurements. Year values are represented by four-digit numbers.\n\n\n\nMonth\nMonth that the point was measured\nAlaska Division of Geological & Geophysical Surveys staff and/or originating data source\n\nMonth values are represented by one or two-digit numbers.\n\n\n\nDay\nDay that the point was measured\nAlaska Division of Geological & Geophysical Surveys staff and/or originating data source\n\nDay values are represented by one or two-digit numbers.\n\n\n\nLatitude\nWGS84 latitude of the data point\nAlaska Division of Geological & Geophysical Surveys\n\nLatitude units are decimal degrees. Many of the measurements in this data set were originally published or recorded using a different coordinate system. To provide consistency throughout the database, all positional values have been standardized to the WGS 84 coordinate system. Users can find the uncertainty associated with the relative point locations in the corresponding Horizontal_Uncertainty field, for absolute horizontal uncertainty see 'How accurate are the geographic locations?'\n\n\n\nLongitude\nWGS84 longitude of the data point\nAlaska Division of Geological & Geophysical Surveys\n\nLongitude units are decimal degrees. Many of the measurements in this data set were originally published or recorded using a different coordinate system. To provide consistency throughout the database, all positional values have been standardized to the WGS 84 coordinate system. Users can find the uncertainty associated with the relative point locations in the corresponding Horizontal_Uncertainty field, for absolute horizontal uncertainty see 'How accurate are the geographic locations?'\n\n\n\nElevation_Plot\nThe elevation of the point in meters\nAlaska Division of Geological & Geophysical Surveys\n\nThis is either the measured elevation value or a converted value that has been calculated to be consistent with related records for use in interactive, online mapping applications. Many of the measurements in this data set were originally published or recorded using a different coordinate system. When possible, we have converted all points throughout the database to use a consistent vertical datum. The vertical coordinate system for each elevation_plot value is specified in the corresponding Vertical_Datum_Plot field. Users can find the uncertainty associated with the relative point elevations in the corresponding Vertical_Uncertainty field, for absolute vertical uncertainty see 'How accurate are the heights or depths?'\n\n\n\nVertical_Datum_Plot\nThe vertical datum of the point\nAlaska Division of Geological & Geophysical Surveys\n\nThis value specifies the vertical datum (and Geoid model or tidal Epoch, if necessary) and the units used to generate the Elevation_Plot value. The general format is similar to: 'NAVD88(Geoid12A), m'. When possible, we have converted all points throughout the database to use a consistent vertical datum.\n\n\n\nLine\nThe elevation profile number\nAlaska Division of Geological & Geophysical Surveys\n\nEach location may have data for multiple shoreface elevation profiles. Line numbers are assigned to each elevation profile to differentiate between profiles. When a new profile is incorporated into the database, line numbers are generated according to the next available number in the sequence. When existing elevation profiles are re-measured, the data is linked to the historical measurements with this identifier.\n\n\n\nPoint\nThe point number within the profile.\nAlaska Division of Geological & Geophysical Surveys\n\nPoint numbers are unique within a given profile and assigned according to the next available number in the sequence. The number increases with distance from the open ocean.\n\n\n\nCollector\nThe name and affiliation of the person who collected the data, when available.\nAlaska Division of Geological & Geophysical Surveys staff and/or originating data source\n\nThe general format is similar to: 'M. DeRaps, A. Gould, N. Kinsman'.\n\n\n\nMethod\nThe method of coastal elevation measurement\nAlaska Division of Geological & Geophysical Surveys staff and/or originating data source\n\nPossibilities include, but are not limited to: DGPS (Differential Global Positioning System), DEM (Digital Elevation Model), Lidar, 'Emery Rod' differential leveling (Emery 1961), or Total Station.\n\n\n\nGrainsize\nMedian particle diameter (D50) in mm.\nAlaska Division of Geological & Geophysical Surveys staff or originating data source\n\nParticle diameter is presented in millimeters. See Grainsize_Method field for additional information about how the grainsize was determined. Note: A zero value indicates that a grainsize measurement is not available.\n\n\n\nGrainsize_Method\nThe method used to determine grainsize and, when available, the name of the person who conducted the analysis\nAlaska Division of Geological & Geophysical Surveys staff and/or the originating data source\n\nPossibilities include, but are not limited to: sieve, wet sieve, visual assessment, or 'photo' (measurement approximation based on image autocorrelation techniques, Buscombe and others, 2010). Note: Blank field values indicate that a grainsize measurement is not available or the method is unknown.\n\n\n\nVertical_Uncertainty\nThe vertical positional uncertainty (in meters) of a given point relative to other points in the line.\nAlaska Division of Geological & Geophysical Surveys staff and/or originating data source\n\nVertical positional uncertainty is provided in meters.\n\n\n\nHorizontal_Uncertainty\nThe horizontal positional uncertainty (in meters) of a given point relative to other points in the line\nAlaska Division of Geological & Geophysical Surveys staff and/or the originating data source\n\nHorizontal positional uncertainty is provided in meters.\n\n\n\nElevation_Raw\nMeasured elevation (in meters) of the point when it was originally recorded\nAlaska Division of Geological & Geophysical Surveys staff and/or originating data source\n\nThe measured elevation is provided in meters.\n\n\n\nVertical_Datum_Raw\nThis value indicates vertical datum and units that were referenced when the point was originally recorded\nAlaska Division of Geological & Geophysical Surveys staff and/or the originating data source\n\nThis value specifies the original vertical datum (and Geoid model or tidal Epoch, if necessary) and the units used at time of data collection. The vertical coordinate system for each elevation value is specified in the corresponding Vertical_Datum_Raw field. The general format is similar to: 'NAVD88(Geoid12A), m'.\n\n\n\nNotes\nAdditional information and/or field observations\nAlaska Division of Geological & Geophysical Surveys staff and/or the originating data source\n\nThis field is optionally populated to provide additional pertinent information that is not readily accommodated by the standardized fields.\n\n\n\n\n\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5020\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\nPlease view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.\n\n\nDDS 7\nThe State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.\n\nDGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.\nContact DGGS for current pricing\n\n\n\n\nASCII tabular files\n\n\n\n\n\nhttp://dx.doi.org/10.14509/27359\nhttp://maps.dggs.alaska.gov/acpt/\n\n\n\n\n\nFree download\n\n\n\n20141013\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5020\n\n\nFGDC Content Standard for Digital Geospatial Metadata\nFGDC-STD-001-1998\nIf the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.\n\nhttp://www.dggs.alaska.gov/metadata/dggs.ext\ndggs metadata extensions\n\n\n\n","source_transform":null,"status":"error"}