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The Legacy 2D Seismic with Ecology dataset (GEO_LEGACY_2D_TRIM_ECOLOGY_LN) was generated by the BC Energy Regulator to be a foundational dataset for planning, executing, and managing 2D seismic restoration projects. The seismic spatial data is derived from the BC TRIM Miscellaneous Lines dataset.
The data is value-added with physical, environmental and land use parameters to support planning operations. This includes attributes for seismic line width, alternate line use, shrub and canopy cover derived from high resolution satellite imagery. Please reference the Caslys 2D Seismic Recovery Mapping Summary Report 2023 for additional information including methods and accuracy assessment.
The dataset also references attributes for soil moisture and soil nutrient regime; line elevation and orientation; adjacent cover type (species, height, and projected age); surrounding BCLSC land use information; land ownership data; forest fire; cutblocks; and wetland information sourced from the BC Geographic Warehouse. These attributes are indicative of forest cover and vegetation adjacent to the seismic line (not on-line vegetation). The dataset also indicates when the line is within identified caribou ranges.
The seismic lines are segmented to capture variable attributes along each seismic line. If for example a line is partially located on private land or a wetland, the line will be in multiple segments where the line intersects different features.
Data Dictionary
Attributes / Column Name | Field Alias | Data Type | Data Precision | Comments |
OBJECTID | Object Id | Object ID | Automatically assigned by database | |
SHAPE | SHAPE | Geometry (Line) | Contains the geometry information for mapping software. | |
SHAPE.LEN | SHAPE.LEN | Double | Line length automatically calculated by database. | |
SEGMENT_ID | Unique Segment ID | Long | ||
LINE_WIDTH | Line Width | Text | 20 | This classifies line width into three classes, either <3m, 3-7m, or >7m. |
WIDTH_CODE | Width Code | Long | This is the width class of the line feature (3m,5m, or 7m). Line width is derived from satellite imagery.* | |
ALTERNATE_USE | Alternate Use | Text | 30 | The alternate use references any other land use on the seismic line, including agriculture, residential, forest fire, cutblock, pipeline, road, hydro line, industrial, recreation and insect damage. This value also identifies where the are no trees or light trees and flags any criteria that may impact interpretation such as cloud cover. Alternate use is derived from satellite imagery and various spatial land use datasets. * |
ALT_USE_CODE | Alternate Use Code | Text | 30 | This field contains the alternate use letter code. If null, then there is not alternate useidentified. * |
TREE_COVER | Tree Cover Class | Text | 30 | This is the tree cover class for the line feature; either none, rare, sporadic-significant, or continuous. This attribute is derived by interpretation of high resolution satellite imagery. * |
TREE_CODE | Tree Code | Long | This is the tree cover class code for the line feature (0,2,5, or 9). * | |
SHRUB_COVER | Shrub Cover Class | Text | 30 | This is the shrub cover class for the line feature; either none, rare, sporadic-significant, or continuous. This attribute is derived by interpretation of high resolution satellite imagery. * |
SHRUB_CODE | Shrub Code | Long | This is the shrub cover class code for the line feature (0,2,5, or 9) | |
RAW_ATTRIBUTES | Full Attribute Code | Text | 30 | This is the full attribute code provided to the record during image interpretation. It will either be a numeric code indicating width, tree cover, and shrub cover, or a letter code indicating alternate use. For reference only. * |
ASSESSMENT_3D | 3D Seismic | Text | 1 | The field identifies if a record was flagged as a 3D seismic feature. A “Y” in this fieldindicated that it is a 3D feature. It may be fully or martially attributed. There are incidentally some 3D lines in the base dataset, although the data is primarily 2D seismic. * |
ADMIT_YEAR | TRIM Year | Short | Year the data was committed to the TRIM database. | |
ASRC_YEAR | Admit Source Year | Short | The admit source year of the imagery used when the data was first committed to the TRIM database. | |
RSRC_YEAR | Imagery Year | Short | The year of the imagery used when revisions or updates were done in TRIM. | |
BCGS_TILE | BCGS Tile ID | Text | 7 | BCGS Tile ID. |
SOURCE_ID | TRIM Source ID | Text | 52 | TRIM designated line identifier. |
TRIMLENGTH | TRIM Source Length (m) | Double | TRIM line feature length (note lines may be segmented). | |
Z_MIN | Z Min | Double | Minimum line elevation sourced from Digital Elevation Model (Shuttle Topography Radar Mission). | |
Z_MAX | Z Max | Double | Maximum line elevation sourced from Digital Elevation Model (Shuttle Topography Radar Mission). | |
Z_MEAN | Z Mean | Double | Mean line elevation sourced from Digital Elevation Model (Shuttle Topography Radar Mission). | |
ORIENTATION | Line Orientation (Degrees) | Double | Line orientation from geometry. | |
BCLCS_LEVEL_1 | BCLCS Level 1 | Text | 10 | From BC Land Cover Classification Scheme. V = vegetated N = non-vegetated and U = unreported |
BCLCS_LEVEL_2 | BCLCS Level 2 | Text | 10 | From BC Land Cover Classification Scheme. T = Treed (if >10% area is live crown cover) N = non-treed OR for non-vegetated areas L = land and W = water |
BCLCS_LEVEL_3 | BCLCS Level 3 | Text | 10 | From BC Land Cover Classification Scheme. W = wetland U = upland and A = alpine |
BCLCS_LEVEL_4 | BCLCS Level 4 | Text | 10 | From BC Land Cover Classification Scheme. For Treed Units: TC = treed-coniferous TB = treed-broadleaf and TM = tree-mixed. For non-treed units ST = shrub tall, SL = shrub low, HE = Herb, HF = Herbs predominantly forbs HG = herbs predominantly graminoids, BY = bryoid, BM byroad-moss (predominantly mosses, liverworts and hornworts), BL = byroad-lichens (predominantly lichens). For non-vegetated: SI = snow ice, RO = rock/rubble, EL = exposed land. |
BCLCS_LEVEL_5 | BCLCS Level 5 | Text | 10 | From BC Land Cover Classification Scheme. For treed, shrub and herb: DE = Dense, OP = open, SP= sparse. For bryoids: CL = closed cover >50%, OP = open <50%. For non-vegetated GL = glacier, PN = Snow Cover, BR = bedrock, TA = talus, BI = blockfield, MZ = Rubbly Mine Spoils, LN = lavabed. For exposed soil: RS = river sediments, ES = exposed soils, LS = pond or lake sediments, RM = reservoir margin, BU = burned area, MU = mudflat, RZ = road surface, MN = moraine, GP = gravel pit, UR = urban, CL= cultivated land, MI = open pit mine. For water cover: LA = lake, RE = reservoir, RI = stream/river. |
BEC_PHASE | BEC Phase | Text | 1 | A code indicating the areas biogeoclimatic phase. |
BEC_SUBZONE | BEC Subzone | Text | 3 | A code indicating the areas biogeoclimatic subzone. Subzone names define the normal regional climate for the division if a biogeoclimatic zone. |
BEC_VARIANT | BEC Variant | Text | 1 | A code indicating the areas biogeoclimatic variant. This denotes a location within a biogeoclimatic subzone (i.e. eastern) |
BEC_ZONE_CODE | BEC Zone Code | Text | 4 | A code indicating the areas biogeoclimatic zone. This is the name given to a large geographic area having similar patterns of energy flow, vegetation, and soils as a result if a broad homogeneous macro climate. |
CROWN_CLOSURE | Crown Closure | Short | Percentage ground area covered by the crown of tree cover | |
EST_COVERAGE_PCT | Estimated Coverage Percent | Short | The amount the polygon occupied by the predominate Land Cover Component. | |
EST_SITE_INDEX | Estimated Site Index | Double | Estimated site index | |
FOR_MGMT_LAND_BASE | Forest Mgmt Land Base Indicator | Text | 1 | An indicator showing the line is in the Forest Management Land base |
FREETOGROW | Free to Grow Indicator | Text | 1 | Indicates whether or not the polygon represents a Free To Grow opening. |
FULL_LABEL | VRI Full Label | Text | 1000 | The full Vegetation Map label. It contains the polygon id, Opening number, species composition, projected age, projected height, site index and crown closure, and indicator of shrub, herb, bryoid, or non vegetative components |
HARVEST_DATE | Harvest Date | Date | The date in which the area was last harvested. | |
HERB_COV_PAT | Herb Cover Pattern | Text | 10 | Spatial distribution of shrubs in a polygon (clumps, continuous, patchy) |
HERB_COV_PCT | Herb Cover Percent | Short | The portion of herb cover that is not obscured by canopy cover. | |
HERB_COV_TYPE | Herb Cover Type | Text | 10 | Herb types as defined in the VRI |
LINE_3_TREE_SPECIES | Line 3 Tree Species | Text | 50 | A list of major species (minor species) ordered by percentage. The species symbols are F (Douglas fir), C (western red cedar), H (hemlock), B (balsam), S (spruce), Sb (black spruce), Yc (yellow cedar), Pw (western white pine), Pa (whitebark pine), Pf (limber pine), Pl (lodgepole pine), Pj (jack pine), Py (yellow pine), L (larch), Ac (cottonwood), D (red alder), Mb (broadleaf maple), E (birch), Al (aspen). |
LINE_4_CLASSES_IDX | Label Line 4 Classes Indexes | Text | 12 | Line 4 is made up of 4 numerical characters followed by a hyphen, the site index, a slash, and the estimated site index. The four numerical characters represent projected age class, projected height class, projected stocking class, and crown closure class in that order. |
LINE_5_VEG_COVER | Line 5 Vegetation Cover | Text | 11 | A listing of the non-vegetated descriptors or the non tree vegetative cover types ordered from most to least common. Possible values in the list are sh (shrub), he (herb), by (bryoid), or the non-vegetative cover codes. |
NON_FOREST_DESC | Non Forest Descriptor | Text | 10 | Flag identifying land segments that are not forested sourced from VRI as per the British Columbia Land Cover Classification Scheme Level 2 T = Treed A polygon is considered Treed if at least 10% of the polygon area, by crown cover, consists of tree species of any size. N = Non-treed A polygon is considered Non-Treed if less than 10% of the polygon area, by crown cover, consists of tree species of any size. |
OPENING_ID | Opening ID | Long | Unique identified assigned to a forest opening | |
PROJ_AGE_1 | Projected Age 1 | Short | The projected age of the dominant species in the stand | |
PROJ_AGE_2 | Projected Age 2 | Short | The projected age of the second most common species in the stand | |
PROJ_HEIGHT_1 | Projected Height 1 | Double | The projected height of the dominant species in the stand | |
PROJ_HEIGHT_2 | Projected Height 2 | Double | The projected height of the second most common species in the stand | |
SITE_IDX | Site Index | Double | Site index is an estimate of site productivity for tree growth | |
SMALL_LABEL | Small Label | Text | 200 | Vegetation Map label. It contains the polygon id, opening number, species composition, projected age class, projected height class, crown closure class, a hyphen, site index, a forward slash, estimated site index, and code(s) for shrub, herb, bryoid, or non vegetative components, and the historic disturbance and forest management activities. It is at most 8 lines. Back slashes represent carriage returns. |
SOIL_MOIST_REG_1 | Soil Moisture Regime 1 | Text | 10 | Refers to the average amount of soil water. Coded 0-8. 0 = very xeric, 1 = exeric, 2 = subexeric, 3 = sumesic, 4 = mesic, 5 = subhygric, 6 = hygric 7 = subhydric and 8 = hydric. |
SOIL_NUTR_REG | Soil Nutrient Regime | Text | 10 | The relative amount of essential soil nutrients, particularly nitrogen. Coded A-F. A = very poor, B = poor, C = medium, D = rich, E = very rich and F = ultra rich. |
SPECIES_CD_1 | Species Composition Code 1 | Text | 10 | The predominate type of tree in the leading tree layer, |
SPECIES_CD_2 | Species Composition Code 2 | Text | 10 | The second most dominant tree species in the leading tree layer. |
SPECIES_PCT_1 | Species Percent 1 | Double | This is the leading species as per the VRI Species Composition Code. A code describing the leading commercial species or brush species in the layer. The species with the highest percent composition (e.g. gross volume or, if a very young stand, the relative number of stems per hectare) is identified a the leading commercial species. Species must be above a specified diameter to be recognized in the species composition of the layer. Leading species are described in terms of Genus, Species and Subspecies. There are currently 27 commercial tree species and five genus values recognized in the Province. The code may also used to describe brush species in cases where the Non-Productive Descriptor is NPBR or the Non-Forest Descriptor is NCBR. Measurement Criteria The species with the highest percent composition is identified as the leading commercial species. Leading species are described in terms of Genus, Species and Subspecies. | |
SPECIES_PCT_2 | Species Percent 2 | Double | Second Species Description: A code describing the leading commercial species or brush species in the layer. The species with the highest percent composition (e.g. gross volume or, if a very young stand, the relative number of stems per hectare) is identified a the leading commercial species. Species must be above a specified diameter to be recognized in the species composition of the layer. Leading species are described in terms of Genus, Species and Subspecies. There are currently 27 commercial tree species and five genus values recognized in the Province. The code may also used to describe brush species in cases where the Non-Productive Descriptor is NPBR or the Non-Forest Descriptor is NCBR. | |
TREE_COV_PAT | Tree Cover Pattern | Text | 10 | The spatial distribution of the tree cover within each tree layer in the polygon. |
TREE_NOTREE | Tree Notree | Text | 20 | Summary class – is the area treed or not treed |
WATERBODY_ID | Waterbody Poly ID | Double | Wetland Waterbody_Poly_ID as sourced from Fresh Water Atlas | |
WETLAND | Wetland Indicator | Text | 10 | Occurrence of Wetland area as sourced from Fresh Water Atlas |
WETLAND_HA | Wetland Area (Ha) | Double | Size of the wetland as sourced from Fresh Water Atlas | |
FIRE_NUMBER | Fire Number | Text | 10 | Unique composite of the following fields: Zone, Fire ID and Fire Centre from |
FIRE_YEAR | Fire Year | Short | Forest year sourced from Fire Perimeters Historical | |
FIRE_LABEL | Fire Label | Text | 16 | Forest fire information sourced from Fire Perimeters Historical |
FIRE_HA | Fire Size (Ha) | Double | Forest fire area sourced from Fire Perimeters Historical | |
FIRE_CLASS | Fire Year Class | Text | 20 | Summary class: FIRE PRE 1970, FIRE 1970-1989, FIRE 1990-2020 (recent) |
OWNER | Landowner | Long | Landowner information from Generalized Forest Ownership code 40 = private | |
OWNER_DESCR | Ownership Description | Text | 100 | Landowner description from Generalized Forest Ownership |
SCHEDULE | Schedule | Text | 1 | Code indicating whether or not a given area is available for long-term integrated resource management, i.e., A, B, or C (land available for long-term integrated resource management), N (not available), or U (availability unknown). This code is used in conjunction with the Ownership code to determine land that contributes to the forest land base from Generalized Forest Ownership |
SEG_LENGTH | Segment Length | Short | Seismic line segment length within given unique land type calculated field | |
HERD_NAME | Herd Name | Text | 40 | Caribou herd names as defined by Caribou Herd Location of BC |
ECOTYPE | Caribou Ecology Type | Text | 10 | A definition of caribou ecology type as defined by Caribou Herd Location of BC |
CARIBOU | Caribou Indicator | Text | 10 | Summary indicator to identify where lines intersect Caribou Herd Location of BC |
HARVEST_YR | Harvest Year | Short | Harvest year is derived from the disturbance start date or satellite imagery. This is extracted from the Consolidated Cutblocks. | |
CUTBLOCK | Cutblock Indicator | Text | 10 | Summary indicator to show where lines intersect Cutblocks. Source Consolidated Cutblocks. |
*Source: Caslys
Renewal Triggers and Service Levels
To be determined
Downstream Applications
Web Application | Map Service |
BCER Data Center | https://www.bcogc.ca/data-reports/data-centre/?category=44925 |
Map Service |
Contact Information:
For further information please contact environmental.support@bc-er.ca
The Legacy 2D Seismic with Ecology dataset (GEO_LEGACY_2D_TRIM_ECOLOGY_LN) was generated by the BC Energy Regulator to be a foundational dataset for planning, executing, and managing 2D seismic restoration projects. The seismic spatial data is derived from the BC TRIM Miscellaneous Lines dataset.
The data is value-added with physical, environmental and land use parameters to support planning operations. This includes attributes for seismic line width, alternate line use, shrub and canopy cover derived from high resolution satellite imagery. Please reference the Caslys 2D Seismic Recovery Mapping Summary Report 2023 for additional information including methods and accuracy assessment.
The dataset also references attributes for soil moisture and soil nutrient regime; line elevation and orientation; adjacent cover type (species, height, and projected age); surrounding BCLSC land use information; land ownership data; forest fire; cutblocks; and wetland information sourced from the BC Geographic Warehouse. These attributes are indicative of forest cover and vegetation adjacent to the seismic line (not on-line vegetation). The dataset also indicates when the line is within identified caribou ranges.
The seismic lines are segmented to capture variable attributes along each seismic line. If for example a line is partially located on private land or a wetland, the line will be in multiple segments where the line intersects different features.
Data Dictionary
Attributes / Column Name | Field Alias | Data Type | Data Precision | Comments |
OBJECTID | Object Id | Object ID | Automatically assigned by database | |
SHAPE | SHAPE | Geometry (Line) | Contains the geometry information for mapping software. | |
SHAPE.LEN | SHAPE.LEN | Double | Line length automatically calculated by database. | |
SEGMENT_ID | Unique Segment ID | Long | ||
LINE_WIDTH | Line Width | Text | 20 | This classifies line width into three classes, either <3m, 3-7m, or >7m. |
WIDTH_CODE | Width Code | Long | This is the width class of the line feature (3m,5m, or 7m). Line width is derived from satellite imagery.* | |
ALTERNATE_USE | Alternate Use | Text | 30 | The alternate use references any other land use on the seismic line, including agriculture, residential, forest fire, cutblock, pipeline, road, hydro line, industrial, recreation and insect damage. This value also identifies where the are no trees or light trees and flags any criteria that may impact interpretation such as cloud cover. Alternate use is derived from satellite imagery and various spatial land use datasets. * |
ALT_USE_CODE | Alternate Use Code | Text | 30 | This field contains the alternate use letter code. If null, then there is not alternate useidentified. * |
TREE_COVER | Tree Cover Class | Text | 30 | This is the tree cover class for the line feature; either none, rare, sporadic-significant, or continuous. This attribute is derived by interpretation of high resolution satellite imagery. * |
TREE_CODE | Tree Code | Long | This is the tree cover class code for the line feature (0,2,5, or 9). * | |
SHRUB_COVER | Shrub Cover Class | Text | 30 | This is the shrub cover class for the line feature; either none, rare, sporadic-significant, or continuous. This attribute is derived by interpretation of high resolution satellite imagery. * |
SHRUB_CODE | Shrub Code | Long | This is the shrub cover class code for the line feature (0,2,5, or 9) | |
RAW_ATTRIBUTES | Full Attribute Code | Text | 30 | This is the full attribute code provided to the record during image interpretation. It will either be a numeric code indicating width, tree cover, and shrub cover, or a letter code indicating alternate use. For reference only. * |
ASSESSMENT_3D | 3D Seismic | Text | 1 | The field identifies if a record was flagged as a 3D seismic feature. A “Y” in this fieldindicated that it is a 3D feature. It may be fully or martially attributed. There are incidentally some 3D lines in the base dataset, although the data is primarily 2D seismic. * |
ADMIT_YEAR | TRIM Year | Short | Year the data was committed to the TRIM database. | |
ASRC_YEAR | Admit Source Year | Short | The admit source year of the imagery used when the data was first committed to the TRIM database. | |
RSRC_YEAR | Imagery Year | Short | The year of the imagery used when revisions or updates were done in TRIM. | |
BCGS_TILE | BCGS Tile ID | Text | 7 | BCGS Tile ID. |
SOURCE_ID | TRIM Source ID | Text | 52 | TRIM designated line identifier. |
TRIMLENGTH | TRIM Source Length (m) | Double | TRIM line feature length (note lines may be segmented). | |
Z_MIN | Z Min | Double | Minimum line elevation sourced from Digital Elevation Model (Shuttle Topography Radar Mission). | |
Z_MAX | Z Max | Double | Maximum line elevation sourced from Digital Elevation Model (Shuttle Topography Radar Mission). | |
Z_MEAN | Z Mean | Double | Mean line elevation sourced from Digital Elevation Model (Shuttle Topography Radar Mission). | |
ORIENTATION | Line Orientation (Degrees) | Double | Line orientation from geometry. | |
BCLCS_LEVEL_1 | BCLCS Level 1 | Text | 10 | From BC Land Cover Classification Scheme. V = vegetated N = non-vegetated and U = unreported |
BCLCS_LEVEL_2 | BCLCS Level 2 | Text | 10 | From BC Land Cover Classification Scheme. T = Treed (if >10% area is live crown cover) N = non-treed OR for non-vegetated areas L = land and W = water |
BCLCS_LEVEL_3 | BCLCS Level 3 | Text | 10 | From BC Land Cover Classification Scheme. W = wetland U = upland and A = alpine |
BCLCS_LEVEL_4 | BCLCS Level 4 | Text | 10 | From BC Land Cover Classification Scheme. For Treed Units: TC = treed-coniferous TB = treed-broadleaf and TM = tree-mixed. For non-treed units ST = shrub tall, SL = shrub low, HE = Herb, HF = Herbs predominantly forbs HG = herbs predominantly graminoids, BY = bryoid, BM byroad-moss (predominantly mosses, liverworts and hornworts), BL = byroad-lichens (predominantly lichens). For non-vegetated: SI = snow ice, RO = rock/rubble, EL = exposed land. |
BCLCS_LEVEL_5 | BCLCS Level 5 | Text | 10 | From BC Land Cover Classification Scheme. For treed, shrub and herb: DE = Dense, OP = open, SP= sparse. For bryoids: CL = closed cover >50%, OP = open <50%. For non-vegetated GL = glacier, PN = Snow Cover, BR = bedrock, TA = talus, BI = blockfield, MZ = Rubbly Mine Spoils, LN = lavabed. For exposed soil: RS = river sediments, ES = exposed soils, LS = pond or lake sediments, RM = reservoir margin, BU = burned area, MU = mudflat, RZ = road surface, MN = moraine, GP = gravel pit, UR = urban, CL= cultivated land, MI = open pit mine. For water cover: LA = lake, RE = reservoir, RI = stream/river. |
BEC_PHASE | BEC Phase | Text | 1 | A code indicating the areas biogeoclimatic phase. |
BEC_SUBZONE | BEC Subzone | Text | 3 | A code indicating the areas biogeoclimatic subzone. Subzone names define the normal regional climate for the division if a biogeoclimatic zone. |
BEC_VARIANT | BEC Variant | Text | 1 | A code indicating the areas biogeoclimatic variant. This denotes a location within a biogeoclimatic subzone (i.e. eastern) |
BEC_ZONE_CODE | BEC Zone Code | Text | 4 | A code indicating the areas biogeoclimatic zone. This is the name given to a large geographic area having similar patterns of energy flow, vegetation, and soils as a result if a broad homogeneous macro climate. |
CROWN_CLOSURE | Crown Closure | Short | Percentage ground area covered by the crown of tree cover | |
EST_COVERAGE_PCT | Estimated Coverage Percent | Short | The amount the polygon occupied by the predominate Land Cover Component. | |
EST_SITE_INDEX | Estimated Site Index | Double | Estimated site index | |
FOR_MGMT_LAND_BASE | Forest Mgmt Land Base Indicator | Text | 1 | An indicator showing the line is in the Forest Management Land base |
FREETOGROW | Free to Grow Indicator | Text | 1 | Indicates whether or not the polygon represents a Free To Grow opening. |
FULL_LABEL | VRI Full Label | Text | 1000 | The full Vegetation Map label. It contains the polygon id, Opening number, species composition, projected age, projected height, site index and crown closure, and indicator of shrub, herb, bryoid, or non vegetative components |
HARVEST_DATE | Harvest Date | Date | The date in which the area was last harvested. | |
HERB_COV_PAT | Herb Cover Pattern | Text | 10 | Spatial distribution of shrubs in a polygon (clumps, continuous, patchy) |
HERB_COV_PCT | Herb Cover Percent | Short | The portion of herb cover that is not obscured by canopy cover. | |
HERB_COV_TYPE | Herb Cover Type | Text | 10 | Herb types as defined in the VRI |
LINE_3_TREE_SPECIES | Line 3 Tree Species | Text | 50 | A list of major species (minor species) ordered by percentage. The species symbols are F (Douglas fir), C (western red cedar), H (hemlock), B (balsam), S (spruce), Sb (black spruce), Yc (yellow cedar), Pw (western white pine), Pa (whitebark pine), Pf (limber pine), Pl (lodgepole pine), Pj (jack pine), Py (yellow pine), L (larch), Ac (cottonwood), D (red alder), Mb (broadleaf maple), E (birch), Al (aspen). |
LINE_4_CLASSES_IDX | Label Line 4 Classes Indexes | Text | 12 | Line 4 is made up of 4 numerical characters followed by a hyphen, the site index, a slash, and the estimated site index. The four numerical characters represent projected age class, projected height class, projected stocking class, and crown closure class in that order. |
LINE_5_VEG_COVER | Line 5 Vegetation Cover | Text | 11 | A listing of the non-vegetated descriptors or the non tree vegetative cover types ordered from most to least common. Possible values in the list are sh (shrub), he (herb), by (bryoid), or the non-vegetative cover codes. |
NON_FOREST_DESC | Non Forest Descriptor | Text | 10 | Flag identifying land segments that are not forested sourced from VRI as per the British Columbia Land Cover Classification Scheme Level 2 T = Treed A polygon is considered Treed if at least 10% of the polygon area, by crown cover, consists of tree species of any size. N = Non-treed A polygon is considered Non-Treed if less than 10% of the polygon area, by crown cover, consists of tree species of any size. |
OPENING_ID | Opening ID | Long | Unique identified assigned to a forest opening | |
PROJ_AGE_1 | Projected Age 1 | Short | The projected age of the dominant species in the stand | |
PROJ_AGE_2 | Projected Age 2 | Short | The projected age of the second most common species in the stand | |
PROJ_HEIGHT_1 | Projected Height 1 | Double | The projected height of the dominant species in the stand | |
PROJ_HEIGHT_2 | Projected Height 2 | Double | The projected height of the second most common species in the stand | |
SITE_IDX | Site Index | Double | Site index is an estimate of site productivity for tree growth | |
SMALL_LABEL | Small Label | Text | 200 | Vegetation Map label. It contains the polygon id, opening number, species composition, projected age class, projected height class, crown closure class, a hyphen, site index, a forward slash, estimated site index, and code(s) for shrub, herb, bryoid, or non vegetative components, and the historic disturbance and forest management activities. It is at most 8 lines. Back slashes represent carriage returns. |
SOIL_MOIST_REG_1 | Soil Moisture Regime 1 | Text | 10 | Refers to the average amount of soil water. Coded 0-8. 0 = very xeric, 1 = exeric, 2 = subexeric, 3 = sumesic, 4 = mesic, 5 = subhygric, 6 = hygric 7 = subhydric and 8 = hydric. |
SOIL_NUTR_REG | Soil Nutrient Regime | Text | 10 | The relative amount of essential soil nutrients, particularly nitrogen. Coded A-F. A = very poor, B = poor, C = medium, D = rich, E = very rich and F = ultra rich. |
SPECIES_CD_1 | Species Composition Code 1 | Text | 10 | The predominate type of tree in the leading tree layer, |
SPECIES_CD_2 | Species Composition Code 2 | Text | 10 | The second most dominant tree species in the leading tree layer. |
SPECIES_PCT_1 | Species Percent 1 | Double | This is the leading species as per the VRI Species Composition Code. A code describing the leading commercial species or brush species in the layer. The species with the highest percent composition (e.g. gross volume or, if a very young stand, the relative number of stems per hectare) is identified a the leading commercial species. Species must be above a specified diameter to be recognized in the species composition of the layer. Leading species are described in terms of Genus, Species and Subspecies. There are currently 27 commercial tree species and five genus values recognized in the Province. The code may also used to describe brush species in cases where the Non-Productive Descriptor is NPBR or the Non-Forest Descriptor is NCBR. Measurement Criteria The species with the highest percent composition is identified as the leading commercial species. Leading species are described in terms of Genus, Species and Subspecies. | |
SPECIES_PCT_2 | Species Percent 2 | Double | Second Species Description: A code describing the leading commercial species or brush species in the layer. The species with the highest percent composition (e.g. gross volume or, if a very young stand, the relative number of stems per hectare) is identified a the leading commercial species. Species must be above a specified diameter to be recognized in the species composition of the layer. Leading species are described in terms of Genus, Species and Subspecies. There are currently 27 commercial tree species and five genus values recognized in the Province. The code may also used to describe brush species in cases where the Non-Productive Descriptor is NPBR or the Non-Forest Descriptor is NCBR. | |
TREE_COV_PAT | Tree Cover Pattern | Text | 10 | The spatial distribution of the tree cover within each tree layer in the polygon. |
TREE_NOTREE | Tree Notree | Text | 20 | Summary class – is the area treed or not treed |
WATERBODY_ID | Waterbody Poly ID | Double | Wetland Waterbody_Poly_ID as sourced from Fresh Water Atlas | |
WETLAND | Wetland Indicator | Text | 10 | Occurrence of Wetland area as sourced from Fresh Water Atlas |
WETLAND_HA | Wetland Area (Ha) | Double | Size of the wetland as sourced from Fresh Water Atlas | |
FIRE_NUMBER | Fire Number | Text | 10 | Unique composite of the following fields: Zone, Fire ID and Fire Centre from |
FIRE_YEAR | Fire Year | Short | Forest year sourced from Fire Perimeters Historical | |
FIRE_LABEL | Fire Label | Text | 16 | Forest fire information sourced from Fire Perimeters Historical |
FIRE_HA | Fire Size (Ha) | Double | Forest fire area sourced from Fire Perimeters Historical | |
FIRE_CLASS | Fire Year Class | Text | 20 | Summary class: FIRE PRE 1970, FIRE 1970-1989, FIRE 1990-2020 (recent) |
OWNER | Landowner | Long | Landowner information from Generalized Forest Ownership code 40 = private | |
OWNER_DESCR | Ownership Description | Text | 100 | Landowner description from Generalized Forest Ownership |
SCHEDULE | Schedule | Text | 1 | Code indicating whether or not a given area is available for long-term integrated resource management, i.e., A, B, or C (land available for long-term integrated resource management), N (not available), or U (availability unknown). This code is used in conjunction with the Ownership code to determine land that contributes to the forest land base from Generalized Forest Ownership |
SEG_LENGTH | Segment Length | Short | Seismic line segment length within given unique land type calculated field | |
HERD_NAME | Herd Name | Text | 40 | Caribou herd names as defined by Caribou Herd Location of BC |
ECOTYPE | Caribou Ecology Type | Text | 10 | A definition of caribou ecology type as defined by Caribou Herd Location of BC |
CARIBOU | Caribou Indicator | Text | 10 | Summary indicator to identify where lines intersect Caribou Herd Location of BC |
HARVEST_YR | Harvest Year | Short | Harvest year is derived from the disturbance start date or satellite imagery. This is extracted from the Consolidated Cutblocks. | |
CUTBLOCK | Cutblock Indicator | Text | 10 | Summary indicator to show where lines intersect Cutblocks. Source Consolidated Cutblocks. |
*Source: Caslys
Renewal Triggers and Service Levels
To be determined
Downstream Applications
Web Application | Map Service |
BCER Data Center | https://www.bcogc.ca/data-reports/data-centre/?category=44925 |
Map Service |
Contact Information:
For further information please contact environmental.support@bc-er.ca