veg_pi

Title: veg_pi
Abstract:: Photo intrepretation of vegetative data on the Deschutes National Forest and private lands falling within the forest boundary. Initially from 1995 aerial photos, partial update with 2004 photos. This spatial data has an associated Access database (T:\library\gis\r06\des\data\veg_pi_master04.mdb). There is a one-to-many relationship between the spatial data and the database records.
Supplemental_Information:: Database Dictionary for PI Vegetation in Access
Stand Data Table:
VEG_NO Stand number, assigned by photo interpreter, 1 to 6 numeric digits
PHOTO_NO Forest Service photo number, e.g. 1095-060
PI_DATE Date that the stand was photo interpreted
PI_NAME Name of photo interpreter NON_FOREST/ SPECIAL CODES A descriptive code for areas that have less than 10% crown closure to qualify as forested, or there is significant reason to break out a forested stand because of other factors.
Codes:
30 Rock - Predominant feature is rock, lava, or cinder 31 Water - Predominant feature is water, bodies of water > 2 acres and rivers > 120' wide 32 Wet Meadow - Meadows and marshes showing distinct riparian influence 33 Alpine Meadow - high elevation meadows, areas of > 50% grasses/forbs 34 Dry Meadow - Dry open areas of > 50% grasses/forbs 35 Harvest, Regen and/or Fire - Harvested areas and areas of recent fire that may or may not have been replanted; with less than 10% crown closure of detectable trees 36 Shrub land - Open areas of > 50% shrubs with <= 2 trees/acre 38 Bare Ground, Non Forested - Predominately bare ground (slumps, erosion) 39 Agricultural Cropland - Areas under the influence of man for golf courses, row crops, orchards, pastures, fenced fields, etc. 40 Community Areas - Areas within the forest boundary that have a high density of structures. (min of about 1 structure/5 acres) 42 Forested Lava - Forested stands in lava flows (>= 10% crown cover) 43 Right-of-Way - Rights-of-way that show significant variation to the adjacent stands; roads, railroads, pipe lines, transmission lines 49 Floodplain - Empty stream channel, non-vegetated floodplain, oxbow 50 Woodland - Stocking > 2 trees/acre 51 Glaciated - Significant snow fields/glaciated areas that may have scattered rock
SHRUBS Percent shrub cover in 5% increments. Dropped shortly after contract started.
T_PCT_CAN Total Percent Canopy, 1 - 100%, must equal the sum of the layer crown covers
PI_NOTES Descriptive notations from photo interpreter
FIELD_NOTES Descriptive notations from field inspection crews. The following items were summarized from the stand as a whole if present:
Dwarf Mistletoe: DM/species/L-M-H; L = generally in lower third of tree crowns and/or scattered infected trees, M = generally in two-thirds of tree crowns and/or found throughout stand, H = generally whole crowns are infected and/or widespread in stand. e.g. DM/PICO/M
Tree Mortality: (within last 5 years); Mortality/L-M-H; L = 10-30%, M = 31-70%, H = 71-100%. e.g. Mortality/L
Project Name Describes the portion of the entire PI contract that this stand falls within. Matches to GIS coverage of same name.
STAND_VAR Stand Variability - approximate coefficient of variation indicating the nature of the stand's geometry:
Codes:
1 Uniform Stand - stable canopies with normal distribution of spacing and/or species 2 Moderate Variation - canopies with irregular openings and slight to moderate variation in spacing and/or species 3 High Variation - stands should have noticeable irregular openings and uneven distribution and/or species changes 4 Extreme Variation - stands should be of a conglomerate nature (stand with sub-types) with abrupt changes in the stand's sub-types accompanied by highly irregular openings. The conglomerate components will normally be less than 5 acres.

Tree Layer Data Table:

VEG_NO Stand number, assigned by photo interpreter, 1 to 6 numeric digits.
TREE_LAYER Canopy Layer - A canopy layer exists when the trees of the potential layer comprise more than 5% of the total stand canopy cover. Occasionally an overstory of large diameter conifers with less than 5% crown cover may be scattered throughout the stand. In that case, it is acceptable to break out a separate layer with down to 1% crown cover. There are a maximum of three layers for each stand. However, there are some stands with four layers.
Codes:
1 Dominant and co-dominant trees 2 Trees that are 40% to 70% of the height of the first layer 3 Trees that are less than 40% of the height of the first layer
PCT_CANOPY Crown Cover per Layer - list crown cover for each valid layer in 5% increments, from 5% to 100%, also may including 1% for large trees in layer 1.
SIZE_CLASS Size Class for each valid layer
Codes:
1 Seedlings <1.0" dbh and <4.5' tall 2 Seedlings/saplings mixed 3 Saplings 1.0 - 4.9" dbh 4 Saplings/poles mixed 5 Poles 5.0 - 8.9" dbh 6 Poles/small mixed 7 Smaller trees 9.0 - 15.9" dbh 8 Smaller/medium mixed 9 Small trees 16.0 - 20.9" dbh 10 Small/medium mixed 11 Medium trees 21.0 - 31.9" dbh 12 Medium/large mixed 13 Large trees 32" or greater dbh
OLD_SPP_CODE Species coding used in original DNF1 contract, has been migrated to individual species codes, see codes for NEW_SPP_1
NEW_SPP_1 Predominant species code for each layer. A species must occupy the stand by a minimum of 20% crown cover per layer to be considered as a viable data entry. May have up to three species codes per layer. See NEW_SPP_2 and NEW_SPP_3.
Codes:
1 Ponderosa Pine PIPO 2 Western Larch LAOC 3 Lodgepole Pine PICO 4 Douglas Fir PSME 5 White Fir ABCO 6 Pacific Silver Fir ABAM 7 Subalpine Fir ABLA2 8 Engelmann Spruce PIEN 9 Mountain Hemlock TSME 10 Whitebark Pine PIAL 11 Incense Cedar CADE3 12 Shasta Red Fir ABMAS 13 Sugar Pine PILA 14 Western Hemlock TSHE 15 Western Red Cedar THPL 16 Western White Pine PIMO 17 Black Cottonwood POTR2 18 Aspen POTR 19 Mixed Conifer 20 Hardwoods 21 Western Juniper JUOC 22 Noble Fir ABPR 23 Unknown Conifer
NEW_SPP_2 Second species code for each layer. A species must occupy the stand by a minimum of 20% crown cover per layer to be considered as a viable data entry.
Codes:
Same as NEW_SPP_1 above
NEW_SPP_3 Third species code for each layer. A species must occupy the stand by a minimum of 20% crown cover per layer to be considered as a viable data entry.
Codes:
Same as NEW_SPP_1 above

CL_DENSITY Clump Density: The clumpiness attributes describe the overall geometry of the layer, and consists of a description of clump density and clump size. All layers present in the stand receive these attributes.
Codes:
0 Not Clumpy 1 Widely Scattered 2 Moderately Dense 3 Dense
CL_SIZE Clump Size
Codes:
0 Not Clumpy 1 Small (<1 acre) 2 Medium (1 to 2 acres) 3 Large (3 to 5 acres)
O_CRN_DIFF Overstory Crown Differentiation - is determined for the first (tallest) layer only. It provides an estimation of the degree of differentiation among overstory tree crowns and can help in determining coefficients of variation for stand exams and volume estimates. This field was used in the DNF1 phase of the PI Contract and then Stand Variability was used as it was determined that Stand Variability may give more reliable and useful information.
Codes:
0 No Data 1 Low, <30% difference in crown sizes 2 Moderate, 30% to 100% difference 3 High, >100% difference
SNAGS Quantity of snags sighted by stand. The percentages shown under snags sighted per stand reflect the ratio of the number of snags to the total number of trees in the stand. These percentages are intended only to be an approximation. Normally, snags are seen only in the upper canopy, but are occasionally seen in the second layer.
Codes:
0 None 1 Less than 10 % 2 10% to 40% 3 40% to 70% 4 Greater than 70%

veg_pi

Frequently-anticipated questions:

What does this data set describe?

Who produced the data set?

Why was the data set created?

How was the data set created?

How reliable are the data; what problems remain in the data set?

How can someone get a copy of the data set?

Who wrote the metadata?