Name: Glacier Inventory (Polygons)

Display Field: GLACNAME

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Description: Attribute Table Field DescriptionsINV_IDUnique identifier for each glacier and perennial snowfields. The value was created combining the easting and northing using the format ExxNyy where xx is the easting and yy is the northing.X_COORDLongitude in decimal degrees of the centroid of the feature. Y_COORDLatitude in decimal degrees of the centroid of the feature. EASTINGUTM longitude in meters of the centroid of the feature. See UTM_Zone field for the UTM zone. NORTHINGUTM latitude in meters of the centroid of the feature. See UTM_Zone field for the UTM zone. UTM_ZoneUTM zone of the centroid of the feature. RECNO24K identification number. GNIS_IDThe ID from the Geographic Names Information System (GNIS). GLACNAMEOfficial USGS name. If a glacier split into smaller pieces since the 24K mapping, all pieces in this inventory were assigned the glacier name, regardless if it was classified as a glacier or perennial snowfield. CLASSType of feature (glacier, perennial snowfield, or buried ice) based on visual observation.ADM_REGIONTwo-digit code identifying the USFS administrative region. Features were assigned to the region that the majority of the feature is located in. All features were assigned to a USFS region regardless if the feature is on USFS land. ADM_NAMEName of USFS administrative region. Features were assigned to the region that the majority of the feature is located in. All features were assigned to a USFS region regardless if the feature is on USFS land. UNIT_NAMEThe name of the local administrative land the feature is located. GEO_REGIONThe mountain ranges the feature is found on. Corresponds to region in the 24K. STATENAMEFull state name. YEARYear of the main image used for the outline. SOURCE_MATImage used for delineating the outline. DIGITIZERThe person who digitized the outline.AREA_KM2Area of the feature in km2 (calculated using USA_Contiguous_Albers_Equal_Area_Conic_USGS_version projection) U_PERCArea uncertainty as a percentage. COMMENTVarious notes on the feature outlines, including the decisions the digitizer made. See Comment field section below for more details. COMM_PSUComment not to be included in shared version of the database. Comment focused on inventory comparisons and uncertainty. DG_NAMEName of the Digital Globe image (Maxar) used for outlining. LandOwner The federal agency or group that oversees the land the feature is located on. Features were assigned to the agency or group that manges the majority of the land the feature is located on. USFS refers to the United States Forest Service, and NPS refers to the National Park Service. "Other" indicates the land is not managed by the USFS, NPS, or Indian Reservation. Comment NotesNotes on common comments Comments with the format “Used xx to help” indicates additional imagery was used to help outline the feature because the main image had shadows, seasonal snow, or image warping Comments with the format “Used xx to help with seasonal snow” indicate additional imagery was used to help eliminate seasonal snow covering the feature. This does not mean that the main image overall was snowy, but that the individual glacier or perennial snowfield had a significant amount of seasonal snow. DEMs referenced in comments 2011_OLC_DeschutesAgency: Department of Geology and Mineral Industries (DOGAMI)https://gis.dogami.oregon.gov/maps/lidarviewer/adams_edificeAgency: USGShttps://www.sciencebase.gov/catalog/item/5bc623b9e4b0fc368ebbe99aBard, J.A, 2019, High-resolution digital elevation model for Mount Adams and vicinity, Washington, based on lidar surveys of August-September, 2016: U.S. Geological Survey data release, https://doi.org/10.5066/P9Z1HF1K.GlacierPeak_WA_DEMAgency: USGShttps://www.sciencebase.gov/catalog/item/57bf299ee4b0f2f0ceb7534eBard, J.A., 2017, High-resolution digital elevation dataset for Glacier Peak and vicinity, Washington, based on lidar surveys of August-November, 2014 and June, 2015: U.S. Geological Survey data release, https://doi.org/10.5066/F7H41PJG.MountBakerDEM Agency: USGShttps://www.sciencebase.gov/catalog/item/58518b0ee4b0f99207c4f12cBard, J.A., 2017, High-resolution digital elevation dataset for Mount Baker and vicinity, Washington, based on lidar surveys of 2015: U.S. Geological Survey data release, https://doi.org/10.5066/F7WD3XR0.References Dick KA (2013) Glacier Change in the North Cascades, Washington: 1900-2009. Portland State University.Fountain AG, Gray C, Glenn B, Menounos B, Pflug J and Riedel J (2021) Glaciers of the Olympic Mountains, Washington - the past and future 100 years. Earth and Space Science Open Archive, 53. doi:10.1002/essoar.10506746.1.Jin S and others (2019) Overall Methodology Design for the United States National Land Cover Database 2016 Products. Remote Sensing 11(24). doi:10.3390/rs11242971.Selkowitz DJ and Forster RR (2016) Automated mapping of persistent ice and snow cover across the western U.S. with Landsat. ISPRS Journal of Photogrammetry and Remote Sensing 117, 126–140. doi:10.1016/j.isprsjprs.2016.04.001.

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