VRI - 2020 - Forest Vegetation Composite Layers (All Layers)

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Published by the Ministry of Forests, Lands, Natural Resource Operations and Rural Development - Forest Analysis and Inventory
Licensed under Access Only

This is the attribution table for the Vegetation Composite Polygons Linked by Feature _id.

Data and Resources

Dataset Extent

Latitude: 48.0° to 60.0°
Longitude: -139.5° to -113.5°

Additional Information

Contact Information

NameMarc Rousseau (businessExpert)
EmailMarc.Rousseau@gov.bc.ca
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development
Sub-OrganizationForest Analysis and Inventory
NameEdward Fong (businessExpert)
EmailEdward.Fong@gov.bc.ca
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development
Sub-OrganizationForest Analysis and Inventory

Access & Security

Who can view this dataset? Public
Who can download this dataset?Public

Metadata Information

Record Published 2016-12-16
Record Last Modified 2021-02-16
Resource Status onGoing
Spatial DataSDO_GEOMETRY

Object Description

Object Name: WHSE_FOREST_VEGETATION.VEG_COMP_LAYER

Short Name: VGCMPLR
Comments: This is a denormalized summary table combining fields from the following tables: TREE_COVER_LAYER, TREE_SPECIES, TREE_SPECIES_VOLUME, CORP_ORG_UNIT. This table contains a static cut of the VRI data projected to current year and will be updated annually. It is intended for strategic level resource analysis using the current GIS tools.ArcGIS users will link this table to VEG_COMP_POLYGON.

Column Name Short Name Data Type Data Precision Comments
FEATURE_ID FEATURE_ID NUMBER 38
LAYER_ID LAYER_ID VARCHAR2 10 The unique business identification of a layer, or horizontal stratum, in a stand. Each layer is normally characterized as a distinct canopy containing a common forest cover structure with timber of similar ages (at least 40 years between layers) and heights (at least 10 meters between layers). Layers are assigned from the tallest layer downward.
FOR_COVER_RANK_CD RANK_CD VARCHAR2 10 A numeric designation of the relative importance of the layer component in the stand as determined by the business. The level of importance decreases as the numeric designation increases. For Vegetation Cover originated data, this value is assigned via business rule based on the supplied order of the layer records as recorded by the interpreter. For FIP originated data, this value is known as the RANK CD, and is explicitly supplied by the interpreter. The RANK CD, or ranking, is based on Regional guidelines at the time of interpretation. This value is retained for FIP transition purposes, as tree volumes are only calculated by VDYP, the current software/mathematical model in production. The RANK CD will be superseded in time when Vegetation Inventory projection tools are developed.
NON_FOREST_DESCRIPTOR NFOR_DESC VARCHAR2 10 Non commercial forest vegetation on a polygon that is capable of supporting commercial forests. Maps directly to the FIP attribute, NON FOREST DESCRIPTOR and is also utilized for the determination of the BC Land Cover Classification. This is a FIP classification based attribute only, and is retained for the purposes of business transition from FIP to Vegetation Inventory.
INTERPRETED_DATA_SRC_CD INTERP_CD VARCHAR2 10 The source of the data that contributed to the determination of the classification description. All values taken from Table 3-1, PIP This list of values is similar, but not identical to the FIP DATA SOURCE which will be used to validate the FIP file prior to loading. Non-conforming FIP DATA SOURCE values will be converted to the VEGETATION DATA SOURCE values on load to the Vegetative Cover database.
QUAD_DIAM_125 Q_DIAM_125 NUMBER 8 The quadratic mean stand diameter (breast height), at the projection date, based on the 12.5 cm utilization level. Calculated for Rank 1 stands only, type id (TYPID) 1 through 3.
QUAD_DIAM_175 Q_DIAM_175 NUMBER 8 The quadratic mean stand diameter (breast height), at the projection date, based on the 17.5 cm utilization level. Calculated for Rank 1 stands only, Type id (TYPID) for 1 through 3.
QUAD_DIAM_225 Q_DIAM_225 NUMBER 8 The quadratic mean stand diameter (breast height), at the projection date, based on the 22.5 cm utilization level.Calculated for Rank 1 stands only, type id (TYPID) 1 through 3.
EST_SITE_INDEX_SPECIES_CD EST_SI_SPC VARCHAR2 10 The species to which the estimated site index applies.
EST_SITE_INDEX EST_SI NUMBER 5 Estimated site index is an interpreter estimated site index for tree layers with a leading species age less than 31 years. Site index is the mean height of the dominant and codominant trees will attain at a base index age (50 years) used for the purposes of estimating forest site growth capability. The site index is based on a normalized set of coefficients calibrated to reflect the range of heights for a given tree species.
EST_SITE_INDEX_SOURCE_CD STSTNDXSRC VARCHAR2 10 Describes the process used to determine the estimated site index prediction for tree layers with a leading species age less than 31 years.
CROWN_CLOSURE CR_CLOSURE NUMBER 3 The percentage of ground area covered by the vertically projected crowns of the tree cover for each tree layer within the polygon.
CROWN_CLOSURE_CLASS_CD CRWNCLSRCL VARCHAR2 2 The percentage of ground area covered by the vertically projected crowns of the tree cover for each tree layer within the polygon. Represented by a code value in the code list.
REFERENCE_DATE REF_DATE DATE 7 The date of the source data on which the interpretation is based. Known as the "Reference Year" in the VIF file.
SITE_INDEX SITE_INDEX NUMBER 5 Site index is an estimate of site productivity for tree growth (height in metres at breast height age of 50 years). The mean height of the dominant and codominant trees will attain at a base index age used for the purposes of estimating forest site growth capability. The site index is based on a normalized set of coefficients calibrated to reflect the range of heights for a given tree species.
DBH_LIMIT DBH_LIMIT NUMBER 2 A code indicating the minimum diameter breast height (DBH) for measuring trees (i.e. stems) in the field sample. For example, a code of 3 indicates that stems were measured if they had a DBH greater than or equal to 7.5cm.
BASAL_AREA BASAL_AREA NUMBER 10 Confidence indices are a subjective value that reflect confidence of the photo interpreter in the estimation of basal area for each layer.
DATA_SOURCE_BASAL_AREA_CD B_A_DTA_CD VARCHAR2 10 The source of data used for the interpretation of basal area.
VRI_LIVE_STEMS_PER_HA LIVE_STEMS NUMBER 8 The average number of living trees visible to the photo interpreter in the dominant, codominant and high intermediate crown positions in each tree layer in the polygon. It is expressed as stems per hectare.
DATA_SRC_VRI_LIVE_STEM_HA_CD STEM_HA_CD VARCHAR2 10 The source of data used for the interpretation of stand density.
VRI_DEAD_STEMS_PER_HA DEAD_STEMS NUMBER 8 The number of VRI dead tree stems on an unitary per hectare basis.
TREE_COVER_PATTERN TREE_PATRN VARCHAR2 10 The spatial distribution of the tree cover within each tree layer in the polygon. Definition Source: p 6-1, PIP Data Value Source; Figure 6-1
VERTICAL_COMPLEXITY VERT_COMPL VARCHAR2 10 The subjective classification that describes the form of each tree layer as indicated by the relative uniformity of the forest canopy as it appears on mid-scale aerial photographs. Vertical complexity is influenced by stand age, species (succession as it relates to shade tolerance) and degree and age of past disturbances. The tree height range is calculated as the total difference in height between the tallest and shortest visible dominant, codominant, and high intermediate trees. To most adequately represent the tree layer of interest, occasional occurrences of either very tall or very short trees should be ignored so that the vertical complexity indicated is for the majority of stems in the dominant, codominant, and high intermediate portion of each tree layer.
SPECIES_CD_1 SPEC_CD_1 VARCHAR2 10 The code indicating the type of tree species predominate or leading in the tree layer. A "leading" species is identified as being the highest percent basal area or, if a very young stand, the relative number of stems per hectare. Species are described in terms of Genus, Species and variety.
SPECIES_PCT_1 SPEC_PCT_1 NUMBER 5 Percentages of the layer that the leading species occupies. For older stands, tree species percentage is based on percent basal area or, if a very young stand, the relative number of stems per hectare. Tree species percentage is estimated to the nearest percent for all living trees above a specified diameter.
SPECIES_CD_2 SPEC_CD_2 VARCHAR2 10 The code indicating the type of tree species second most dominate in the tree layer. A "second" species is identified in descending order of species percent from the "leading" species. Species are described in terms of Genus, Species and variety.
SPECIES_PCT_2 SPEC_PCT_2 NUMBER 5 Percentages of the layer that the second most dominate species occupies. For older stands, tree species percentage is based on percent basal area or, if a very young stand, the relative number of stems per hectare. Tree species percentage is estimated to the nearest percent for all living trees above a specified diameter.
SPECIES_CD_3 SPEC_CD_3 VARCHAR2 10 The code indicating the type of tree species third most dominate in the tree layer. A "third" species is identified in descending order of species percent from the "leading" species. Species are described in terms of Genus, Species and variety.
SPECIES_PCT_3 SPEC_PCT_3 NUMBER 5 Percentages of the layer that the third most dominate species occupies. For older stands, tree species percentage is based on percent basal area or, if a very young stand, the relative number of stems per hectare. Tree species percentage is estimated to the nearest percent for all living trees above a specified diameter.
SPECIES_CD_4 SPEC_CD_4 VARCHAR2 10 The code indicating the type of tree species fourth most dominate in the tree layer. The "fourth" species is identified in descending order of species percent from the "leading" species. Species are described in terms of Genus, Species and variety.
SPECIES_PCT_4 SPEC_PCT_4 NUMBER 5 Percentages of the layer that the fourth most dominate species occupies. For older stands, tree species percentage is based on percent basal area or, if a very young stand, the relative number of stems per hectare. Tree species percentage is estimated to the nearest percent for all living trees above a specified diameter.
SPECIES_CD_5 SPEC_CD_5 VARCHAR2 10 The code indicating the type of tree species fifth most dominate in the tree layer. The "fifth" species is identified in descending order of species percent from the "leading" species. Species are described in terms of Genus, Species and variety.
SPECIES_PCT_5 SPEC_PCT_5 NUMBER 5 Percentages of the layer that the fifth most dominate species occupies. For older stands, tree species percentage is based on percent basal area or, if a very young stand, the relative number of stems per hectare. Tree species percentage is estimated to the nearest percent for all living trees above a specified diameter.
SPECIES_CD_6 SPEC_CD_6 VARCHAR2 10 The code indicating the type of tree species sixth most dominate in the tree layer. The "sixth" species is identified in descending order of species percent from the "leading" species. Species are described in terms of Genus, Species and variety.
SPECIES_PCT_6 SPEC_PCT_6 NUMBER 5 Percentages of the layer that the sixth most dominate species occupies. For older stands, tree species percentage is based on percent basal area or, if a very young stand, the relative number of stems per hectare. Tree species percentage is estimated to the nearest percent for all living trees above a specified diameter.
PROJ_AGE_1 PROJ_AGE_1 NUMBER 4 The age projected to the adjustment area ground sample date, for Species 1.
PROJ_AGE_CLASS_CD_1 PRJGCLSSCD VARCHAR2 1 The age projected to the adjustment area ground sample date, for Species 1. Classified by standard age classes.
PROJ_AGE_2 PROJ_AGE_2 NUMBER 4 The age projected to the adjustment area ground sample date, for Species 2.
PROJ_AGE_CLASS_CD_2 PRJGCLSSC1 VARCHAR2 1 The age projected to the adjustment area ground sample date, for Species 2. Classified by standard age classes.
DATA_SOURCE_AGE_CD AGE_DTA_CD VARCHAR2 10 The source of data used for the interpretation of year of origin (age), for Species 1.
PROJ_HEIGHT_1 PROJ_HT_1 NUMBER 5 The height projected to the adjustment area ground sample date, for Species 1.
PROJ_HEIGHT_CLASS_CD_1 PRJHGHTCLS VARCHAR2 1 The height projected to the adjustment area ground sample date, for Species 1. Classified by standard height classes
PROJ_HEIGHT_2 PROJ_HT_2 NUMBER 5 The height projected to the adjustment area ground sample date, for Species 2.
PROJ_HEIGHT_CLASS_CD_2 PRJHGHTCL1 VARCHAR2 1 The height projected to the adjustment area ground sample date, for Species 2. Classified by standard height classes
DATA_SOURCE_HEIGHT_CD HT_DATA_CD VARCHAR2 10 The source of data used for the interpretation of height, for Species 1.
LIVE_VOL_PER_HA_SPP1_125 LVVLPRHSPP NUMBER 8 Net live volume per hectare of the leading species determined by percent basal area of the tree layer at the 12.5 cm utilization level.
LIVE_VOL_PER_HA_SPP1_175 LVVLPRHSP1 NUMBER 8 Net live volume per hectare of the leading species determined by percent basal area of the tree layer at the 17.5 cm utilization level.
LIVE_VOL_PER_HA_SPP1_225 LVVLPRHSP2 NUMBER 8 Net live volume per hectare of the leading species determined by percent basal area of the tree layer at the 22.5 cm utilization level.
LIVE_VOL_PER_HA_SPP2_125 LVVLPRHSP3 NUMBER 8 Net live volume per hectare of the second species determined by percent basal area of the tree layer at the 12.5 cm utilization level.
LIVE_VOL_PER_HA_SPP2_175 LVVLPRHSP4 NUMBER 8 Net live volume per hectare of the second species determined by percent basal area of the tree layer at the 17.5 cm utilization level.
LIVE_VOL_PER_HA_SPP2_225 LVVLPRHSP5 NUMBER 8 Net live volume per hectare of the second species determined by percent basal area of the tree layer at the 22.5 cm utilization level.
LIVE_VOL_PER_HA_SPP3_125 LVVLPRHSP6 NUMBER 8 Net live volume per hectare of the third species determined by percent basal area of the tree layer at the 12.5 cm utilization level.
LIVE_VOL_PER_HA_SPP3_175 LVVLPRHSP7 NUMBER 8 Net live volume per hectare of the third species determined by percent basal area of the tree layer at the 17.5 cm utilization level.
LIVE_VOL_PER_HA_SPP3_225 LVVLPRHSP8 NUMBER 8 Net live volume per hectare of the third species determined by percent basal area of the tree layer at the 22.5 cm utilization level.
LIVE_VOL_PER_HA_SPP4_125 LVVLPRHSP9 NUMBER 8 Net live volume per hectare of the fourth species determined by percent basal area of the tree layer at the 12.5 cm utilization level.
LIVE_VOL_PER_HA_SPP4_175 LVVLPRHS10 NUMBER 8 Net live volume per hectare of the fourth species determined by percent basal area of the tree layer at the 17.5 cm utilization level.
LIVE_VOL_PER_HA_SPP4_225 LVVLPRHS11 NUMBER 8 Net live volume per hectare of the fourth species determined by percent basal area of the tree layer at the 22.5 cm utilization level.
LIVE_VOL_PER_HA_SPP5_125 LVVLPRHS12 NUMBER 8 Net live volume per hectare of the fifth species determined by percent basal area of the tree layer at the 12.5 cm utilization level.
LIVE_VOL_PER_HA_SPP5_175 LVVLPRHS13 NUMBER 8 Net live volume per hectare of the fifth species determined by percent basal area of the tree layer at the 17.5 cm utilization level.
LIVE_VOL_PER_HA_SPP5_225 LVVLPRHS14 NUMBER 8 Net live volume per hectare of the fifth species determined by percent basal area of the tree layer at the 22.5 cm utilization level.
LIVE_VOL_PER_HA_SPP6_125 LVVLPRHS15 NUMBER 8 Net live volume per hectare of the sixth species determined by percent basal area of the tree layer at the 12.5 cm utilization level.
LIVE_VOL_PER_HA_SPP6_175 LVVLPRHS16 NUMBER 8 Net live volume per hectare of the sixth species determined by percent basal area of the tree layer at the 17.5 cm utilization level.
LIVE_VOL_PER_HA_SPP6_225 LVVLPRHS17 NUMBER 8 Net live volume per hectare of the sixth species determined by percent basal area of the tree layer at the 22.5 cm utilization level.
DEAD_VOL_PER_HA_SPP1_125 DDVLPRHSPP NUMBER 8 Net dead volume per hectare of the leading species determined by percent basal area of the tree layer at the 12.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP1_175 DDVLPRHSP1 NUMBER 8 Net dead volume per hectare of the leading species determined by percent basal area of the tree layer at the 17.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP1_225 DDVLPRHSP2 NUMBER 8 Net dead volume per hectare of the leading species determined by percent basal area of the tree layer at the 22.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP2_125 DDVLPRHSP3 NUMBER 8 Net dead volume per hectare of the second species determined by percent basal area of the tree layer at the 12.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP2_175 DDVLPRHSP4 NUMBER 8 Net dead volume per hectare of the second species determined by percent basal area of the tree layer at the 17.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP2_225 DDVLPRHSP5 NUMBER 8 Net dead volume per hectare of the second species determined by percent basal area of the tree layer at the 22.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP3_125 DDVLPRHSP6 NUMBER 8 Net dead volume per hectare of the third species determined by percent basal area of the tree layer at the 12.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP3_175 DDVLPRHSP7 NUMBER 8 Net dead volume per hectare of the third species determined by percent basal area of the tree layer at the 17.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP3_225 DDVLPRHSP8 NUMBER 8 Net dead volume per hectare of the third species determined by percent basal area of the tree layer at the 22.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP4_125 DDVLPRHSP9 NUMBER 8 Net dead volume per hectare of the fourth species determined by percent basal area of the tree layer at the 12.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP4_175 DDVLPRHS10 NUMBER 8 Net dead volume per hectare of the fourth species determined by percent basal area of the tree layer at the 17.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP4_225 DDVLPRHS11 NUMBER 8 Net dead volume per hectare of the fourth species determined by percent basal area of the tree layer at the 22.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP5_125 DDVLPRHS12 NUMBER 8 Net dead volume per hectare of the fifth species determined by percent basal area of the tree layer at the 12.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP5_175 DDVLPRHS13 NUMBER 8 Net dead volume per hectare of the fifth species determined by percent basal area of the tree layer at the 17.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP5_225 DDVLPRHS14 NUMBER 8 Net dead volume per hectare of the fifth species determined by percent basal area of the tree layer at the 22.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP6_125 DDVLPRHS15 NUMBER 8 Net dead volume per hectare of the sixth species determined by percent basal area of the tree layer at the 12.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP6_175 DDVLPRHS16 NUMBER 8 Net dead volume per hectare of the sixth species determined by percent basal area of the tree layer at the 17.5 cm utilization level and at the year of death.
DEAD_VOL_PER_HA_SPP6_225 DDVLPRHS17 NUMBER 8 Net dead volume per hectare of the sixth species determined by percent basal area of the tree layer at the 22.5 cm utilization level and at the year of death.
LIVE_STAND_VOLUME_125 LVSTNDVLM1 NUMBER 8 Total net volume per hectare of all live species determined by percent basal area of the tree layer at the 12.5 cm utilization level
LIVE_STAND_VOLUME_175 LVSTNDVLM2 NUMBER 8 Total net volume per hectare of all live species determined by percent basal area of the tree layer at the 17.5 cm utilization level
LIVE_STAND_VOLUME_225 LVSTNDVLM3 NUMBER 8 Total net volume per hectare of all live species determined by percent basal area of the tree layer at the 22.5 cm utilization level
DEAD_STAND_VOLUME_125 DDSTNDVLM1 NUMBER 8 Total net volume per hectare of all dead species determined by percent basal area of the tree layer at the 12.5 cm utilization level at the year of death for the stand
DEAD_STAND_VOLUME_175 DDSTNDVLM2 NUMBER 8 Total net volume per hectare of all dead species determined by percent basal area of the tree layer at the 17.5 cm utilization level at the year of death for the stand
DEAD_STAND_VOLUME_225 DDSTNDVLM3 NUMBER 8 Total net volume per hectare of all dead species determined by percent basal area of the tree layer at the 22.5 cm utilization level at the year of death for the stand
WHOLE_STEM_BIOMASS_PER_HA WHLSTMBMSS NUMBER 8 The total stem biomass per hectare of all species on a minimum diameter utilization of 4.0cm expressed as tonnes/ha.
BRANCH_BIOMASS_PER_HA BRNCHBMSSP NUMBER 8 The total branch biomass per hectare of all species on a minimum diameter utilization of 4.0cm expressed as tonnes/ha.
FOLIAGE_BIOMASS_PER_HA FLGBMSSPRH NUMBER 8 The total foliage biomass per hectare of all species on a minimum diameter utilization of 4.0cm expressed as tonnes/ha.
BARK_BIOMASS_PER_HA BRKBMSSPRH NUMBER 8 The total bark biomass per hectare of all species on a minimum diameter utilization of 4.0cm expressed as tonnes/ha.
ORG_UNIT_NO ORGUNIT_NO NUMBER 10 Number from Org Unit code table representing the organization that collected the data.
ORG_UNIT_CODE ORGUNIT_CD VARCHAR2 18 Identifies any office within the ministry. First character identifies Exec, HQ branch, Region, or District. Next two chars identify the office name; next two the section (HQ Branch) or program (Region or District); last char identifies the subsection.
OBJECTID OBJECTID NUMBER 38 OBJECTID is a column required by spatial layers that interact with ESRI ArcSDE. It is populated with unique values automatically by SDE.