veg_pi

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What does this data set describe?

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%
  1. How should this data set be cited?

    Booser, Jo, 02/15/02, veg_pi.

    Online Links:

    • \\ds.fs.fed.us\EFS\\r06\des\library\gis\r06\des\data\veg_pi04.mdb

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -122.198864
    East_Bounding_Coordinate: -120.748969
    North_Bounding_Coordinate: 44.683618
    South_Bounding_Coordinate: 43.253300

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 1906
    Currentness_Reference: This is the final and current version.

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (52105)
      • Label point (52944)
      • GT-polygon composed of chains (52944)
      • Point (35)
      • Label point (0)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Albers Conical Equal Area.

      Projection parameters:
      Standard_Parallel: 43.000000
      Standard_Parallel: 48.000000
      Longitude_of_Central_Meridian: -120.000000
      Latitude_of_Projection_Origin: 34.000000
      False_Easting: 600000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000083
      Ordinates (y-coordinates) are specified to the nearest 0.000083
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

  7. How does the data set describe geographic features?

    veg_pi

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    VEG_NO
    Stand ID (Source: User assigned)

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    PERIMETER
    Perimeter of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    AREA
    Area of feature in internal units squared. (Source: ESRI)

    Positive real numbers that are automatically generated.

    PI_VEG_

    PI_VEG_ID

    Shape_Length
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    Shape_Area
    Area of feature in internal units squared. (Source: ESRI)

    Positive real numbers that are automatically generated.


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Will Koenitzer, Forest Data Inc. contractor Jo Booser, Deschutes National Forest silviculturist

  3. To whom should users address questions about the data?

    Jo Booser
    Deschutes National Forest
    Forest Silviculturist

    541-383-5787 (voice)
    jbooser@fs.fed.us


Why was the data set created?

This dataset is suitable for broad area and project level analysis down to a scale of 1:24000.


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    (process 1 of 3)
    Dataset copied.

    Data sources used in this process:

    • f:\lib\gis\des\pi_veg

    (process 2 of 3)
    Dataset copied.

    Data sources used in this process:

    • f:\lacampbell\re_proj\lib\des\pi_veg

    (process 3 of 3)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\GSTODD~1\LOCALS~1\Temp\xml7.tmp

  3. What similar or related data should the user be aware of?

    Deschutes National Forest, Jo Booser, Photo interpretation of vegtation on the Deschutes National Forest.


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

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

  5. How consistent are the relationships among the observations, including topology?


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: There are no access restrictions for this dataset.
Use_Constraints:
Not suitable for scales below 1:24000. Source photogrammetry may be available at 1:12000.

  1. Who distributes the data set?[Distributor contact information not provided.]

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 04-Nov-2008
Metadata author:
USDA Forest Service, Deschutes National Forest
c/o Jo Booser
Forest Silviculturist
Deschutes National Forest
Bend, OR 97701
USA

541-383-5787 (voice)
jbooser@fs.fed.us

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.6 on Wed Aug 26 07:56:55 2009