S_R10_TNF.TongassLandslideAreas
This feature class is a polygon landslide inventory of the Tongass National Forest. The digital version of this inventory was started in the year 2000, and updates occur annually. The once-over inventory was completed in 2017. It includes both field and photo interpreted landslides. The inventory includes all mass wasting features--including talus slopes, snow avalanche fields, and snow avalanche chutes. Therefore, it may be necessary to exclude some mass wasting features in this data set when using it to determine landslide rates. Each of these are coded differently in the attributes. Most of the landslide polygons were digitized on the 1998 to 2010 ortho photos in GIS, although some were digitized using photos taken as recently as 2018. All the landslides have been age bracketed within the available photo data sets to estimate year of occurance. Many of them were age bracketed using air photos back to the 1929 Navy Trimegon photos. All landslides have been dated before or after 1948 imagery and before or after the 1996 to 1998 imagery. There is an associated point feature class that contains the landslide initiation zone approximations. These points only exist for true landslides--debris avalanches, debris torrents, combination debris avalanches/torrents, slumps, rotational failures, and rock fall-initiated failures. The feature class is updated annually or as new imagery becomes available. Last updated in April 2020.
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field inventory 1984-86', 'code': 'FSL3'}, {'name': "Landwehr's air photo inventory of Thorn Bay RD", 'code': 'TNB1'}, {'name': "Landwehr's field inventory of slides caused by 1993 storm", 'code': 'TNB2'}, {'name': "Landwehr's field inventory 1990-98 (excluding 1993 storm)", 'code': 'TNB3'}, {'name': '2008 additions, Darin Silkworth', 'code': 'T08'}, {'name': '2009 additions, Darin Silkworth', 'code': 'T09'}, {'name': '2002 additions, Petersburg Ranger District', 'code': 'P02'}, {'name': '2004 additions, Sitka Ranger District', 'code': 'S04'}, {'name': '2005 additions, Sitka Ranger District', 'code': 'S05'}, {'name': '2005 additions, Craig Ranger District', 'code': 'C05'}, {'name': '2002 additions, Craig Ranger District', 'code': 'C02'}, {'name': '2003 additions, Craig Ranger District', 'code': 'C03'}, {'name': '2004 additions, Craig Ranger District', 'code': 'C04'}, {'name': '2006 additions, TBRD, D Silkworth', 'code': 'T06'}, {'name': '2005 airphoto inventory, Margaret and Traitors Watersheds, KMRD, D Silkworth', 'code': 'K05'}, {'name': '2004 air photo inventory', 'code': 'T04'}, {'name': '2007 additions, KMRD, D Silkworth', 'code': 'K07'}, {'name': '2002 and 2003 inventory, various people', 'code': 'T2_3'}, {'name': '2010 additions, Darin Silkworth', 'code': 'T10'}, {'name': '2012 fiscal yr additions, Tongass Soil Scientists', 'code': 'T12'}, {'name': '2010 additions, Jacqueline Foss', 'code': 'T10A'}, {'name': 'Soil Survey, confirmed', 'code': 'SS'}, {'name': 'Soil Survey, unconfirmed', 'code': 'SSU'}, {'name': '2011 fiscal yr additions and edits, Tongass Soil Scientists', 'code': 'T11'}, {'name': '2014 fiscal yr additions and edits, Tongass Soil Scientists', 'code': 'T14'}, {'name': '2015 fiscal yr additions and edits, Tongass Soil Scientists', 'code': 'T15'}, {'name': '2016 fiscal yr additions and edits, Tongass Soil Scientists', 'code': 'T16'}, {'name': '2016 monthly inventory around Sitka, AK', 'code': 'S16'}, {'name': '2017 Additions Tongass Soil Scientists', 'code': 'T17'}, {'name': '2018 Additions Tongass Soil Scientists', 'code': 'T18'}, {'name': '2019 Calender Year Additions', 'code': 'T19'}, {'name': '2020 Calendar Year Additions', 'code': 'T20'}, {'name': '2021 Calendar Year Additions', 'code': 'T21'}]}, 'defaultValue': None}, {'name': 'CONFID_DAT', 'type': 'esriFieldTypeString', 'alias': 'CONFID_DAT', 'sqlType': 'sqlTypeOther', 'length': 9, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'YR_INT_TYP', 'type': 'esriFieldTypeString', 'alias': 'YR_INT_TYP', 'sqlType': 'sqlTypeOther', 'length': 5, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'YR_OCCURANCE', 'type': 'esriFieldTypeInteger', 'alias': 'YR_OCCURANCE', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'LATEST_YEAR_NOTSEEN', 'type': 'esriFieldTypeSmallInteger', 'alias': 'LATEST_YEAR_NOTSEEN', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'FIRST_YEAR_SEEN', 'type': 'esriFieldTypeSmallInteger', 'alias': 'FIRST_YEAR_SEEN', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'TREATMENT', 'type': 'esriFieldTypeString', 'alias': 'TREATMENT', 'sqlType': 'sqlTypeOther', 'length': 1, 'nullable': True, 'editable': True, 'domain': {'type': 'codedValue', 'name': 'tmt_code', 'mergePolicy': 'esriMPTDefaultValue', 'splitPolicy': 'esriSPTDefaultValue', 'codedValues': [{'name': 'Yes', 'code': 'Y'}, {'name': 'No', 'code': 'N'}]}, 'defaultValue': None}, {'name': 'RD_RELATED', 'type': 'esriFieldTypeString', 'alias': 'RD_RELATED', 'sqlType': 'sqlTypeOther', 'length': 1, 'nullable': True, 'editable': True, 'domain': {'type': 'codedValue', 'name': 'Yes_No', 'mergePolicy': 'esriMPTDefaultValue', 'splitPolicy': 'esriSPTDefaultValue', 'codedValues': [{'name': 'Yes', 'code': 'Y'}, {'name': 'No', 'code': 'N'}]}, 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debris avalanche and debris torrent', 'code': 'SOAR-DEFL-FLOW'}, {'name': 'Debris avalanche field', 'code': 'MASC-UNDI-SLID'}, {'name': 'Rock fall initiated failures', 'code': 'SOAR-ROFA-COMP'}, {'name': 'Talus slopes', 'code': 'DEPO-FAPS-FALL'}, {'name': 'Slump', 'code': 'SLEF-COMP'}, {'name': 'Snow avalanche chute', 'code': 'TRZO-SNAS-FLOW'}, {'name': 'Debris avalanche', 'code': 'SOAR-DEAV-FLOW'}, {'name': 'Debris torrent', 'code': 'TRZO-DEFL-FLOW'}, {'name': 'Rotational slide', 'code': 'ROSL-SLID'}, {'name': 'Snow avalanche field', 'code': 'SOAR-SNAS-FLOW'}]}, 'defaultValue': None}, {'name': 'VEG_CLASS', 'type': 'esriFieldTypeString', 'alias': 'VEG_CLASS', 'sqlType': 'sqlTypeOther', 'length': 2, 'nullable': True, 'editable': True, 'domain': {'type': 'codedValue', 'name': 'vegclass_codes_1', 'mergePolicy': 'esriMPTDefaultValue', 'splitPolicy': 'esriSPTDefaultValue', 'codedValues': [{'name': 'Unvegetated', 'code': 'UN'}, {'name': 'Alder', 'code': 'AL'}, {'name': 'Partially revegetated', 'code': 'PV'}, {'name': 'Conifers', 'code': 'CO'}]}, 'defaultValue': None}, {'name': 'EXAMINER', 'type': 'esriFieldTypeString', 'alias': 'EXAMINER', 'sqlType': 'sqlTypeOther', 'length': 50, 'nullable': True, 'editable': True, 'domain': {'type': 'codedValue', 'name': 'examiner_codes_1_1', 'mergePolicy': 'esriMPTDefaultValue', 'splitPolicy': 'esriSPTDefaultValue', 'codedValues': [{'name': 'Darin Silkworth', 'code': 'Darin Silkworth'}, {'name': 'Dennis Landwehr', 'code': 'Dennis Landwehr'}, {'name': 'Becki Saari', 'code': 'Becki Saari'}, {'name': 'Jackie de Montigny', 'code': 'Jackie de Montigny'}, {'name': 'Victoria Anne', 'code': 'Victoria Anne'}, {'name': 'Jacquie Foss', 'code': 'Jacquie Foss'}, {'name': 'Pam Frone', 'code': 'Pam Frone'}, {'name': 'Jenny Richter', 'code': 'Jenny Richter'}]}, 'defaultValue': None}, {'name': 'SLOPE_PER', 'type': 'esriFieldTypeSmallInteger', 'alias': 'SLOPE_PER', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'SLOPE_SHA', 'type': 'esriFieldTypeString', 'alias': 'SLOPE_SHA', 'sqlType': 'sqlTypeOther', 'length': 2, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'BDRK_F_ZON', 'type': 'esriFieldTypeString', 'alias': 'BDRK_F_ZON', 'sqlType': 'sqlTypeOther', 'length': 3, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'PM_F_ZONE', 'type': 'esriFieldTypeString', 'alias': 'PM_F_ZONE', 'sqlType': 'sqlTypeOther', 'length': 3, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'LANDSLIDE_NAME', 'type': 'esriFieldTypeString', 'alias': 'LANDSLIDE_NAME', 'sqlType': 'sqlTypeOther', 'length': 50, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'LANDWEHR_N', 'type': 'esriFieldTypeString', 'alias': 'LANDWEHR_N', 'sqlType': 'sqlTypeOther', 'length': 3, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'GROUPED_SL', 'type': 'esriFieldTypeString', 'alias': 'GROUPED_SL', 'sqlType': 'sqlTypeOther', 'length': 2, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'RECURRANCE', 'type': 'esriFieldTypeString', 'alias': 'RECURRANCE', 'sqlType': 'sqlTypeOther', 'length': 9, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'NUMBER_', 'type': 'esriFieldTypeString', 'alias': 'NUMBER_', 'sqlType': 'sqlTypeOther', 'length': 4, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'ACRES', 'type': 'esriFieldTypeDouble', 'alias': 'ACRES', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'GLOBALID', 'type': 'esriFieldTypeGlobalID', 'alias': 'GLOBALID', 'sqlType': 'sqlTypeOther', 'length': 38, 'nullable': False, 'editable': False, 'domain': None, 'defaultValue': None}, {'name': 'Shape__Area', 'type': 'esriFieldTypeDouble', 'alias': 'Shape__Area', 'sqlType': 'sqlTypeDouble', 'nullable': True, 'editable': False, 'domain': None, 'defaultValue': None}, {'name': 'Shape__Length', 'type': 'esriFieldTypeDouble', 'alias': 'Shape__Length', 'sqlType': 'sqlTypeDouble', 'nullable': True, 'editable': False, 'domain': None, 'defaultValue': None}]
[{'name': 'PK__TNFTONGA__F4B70D85DF5DABA3', 'fields': 'OBJECTID', 'isAscending': True, 'isUnique': True, 'description': '', 'indexType': 'Attribute'}, {'name': 'user_4481.TNFTONGASSLANDSLIDEAREAS_LANDSLIDE_AREAS_Shape_sidx', 'fields': 'SHAPE', 'isAscending': True, 'isUnique': False, 'description': '', 'indexType': 'Spatial'}, {'name': 'Shape__Area_Index', 'fields': 'Shape__Area', 'isAscending': True, 'isUnique': False, 'description': '', 'indexType': 'Attribute'}, {'name': 'Shape__Length_Index', 'fields': 'Shape__Length', 'isAscending': True, 'isUnique': False, 'description': '', 'indexType': 'Attribute'}, {'name': 'FDO_GLOBALID', 'fields': 'GLOBALID', 'isAscending': True, 'isUnique': True, 'description': '', 'indexType': 'Attribute'}]
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[]
[{'name': 'S_R10_TNF.TongassLandslideAreas', 'description': '', 'drawingTool': 'esriFeatureEditToolPolygon', 'prototype': {'attributes': {'ACRES': None, 'NUMBER_': None, 'TNF_LS_NO': None, 'SLIDE_NO': None, 'INVENTORY': None, 'CONFID_DAT': None, 'YR_INT_TYP': None, 'YR_OCCURANCE': None, 'LATEST_YEAR_NOTSEEN': None, 'FIRST_YEAR_SEEN': None, 'TREATMENT': None, 'RD_RELATED': None, 'STRM_IMPAC': None, 'PRED_COVER': None, 'COVER_SPP': None, 'COVER_PERCENT': None, 'FAIL_TYPE': None, 'VEG_CLASS': None, 'EXAMINER': None, 'SLOPE_PER': None, 'SLOPE_SHA': None, 'BDRK_F_ZON': None, 'PM_F_ZONE': None, 'LANDSLIDE_NAME': None, 'LANDWEHR_N': None, 'GROUPED_SL': None, 'RECURRANCE': None}}}]