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Trees in LA County Parks

treesThis dataset contains tree locations and information from 26 parks managed by the Los Angeles County Department of Parks and Recreation.

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Summary
In 2013, the Los Angeles County Department of Parks and Recreation was awarded a grant from the Statewide Prop 84 CALFIRE Inventory Program. Grant monies are to be used toward the collection of tree inventories within underserved areas of the community. The Los Angeles County Parks and Recreation Department identified 26 parks which meet the criteria of the grant guidelines. These parks were inventoried in two phases. Phase 1 included 17 parks; Phase 2 includes 9 parks. All recorded park tree were populatted with species information as well as overall health, maintenance and spatial needs. Tree inventory was conducted based on inventory criteria required by the CALFIRE grant guidelines:

Description
The Los Angeles County Parks and Recreation Department identified 26 parks which meet the criteria of the grant guidelines. These parks were inventoried in two phases. Phase 1 included 17 parks; Phase 2 includes 9 parks. All recorded park tree were populated with species information as well as overall health, maintenance and spatial needs. Tree inventory was conducted based on inventory criteria required by the CALFIRE grant guidelines.

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Data Field Descriptions
  • GLOBALID – Internal ID
  • PROJECT - Tree locations identified by subdivision or code number

1 - East Los Angeles

2 - East Rancho Dominguez

3 - Lennox

4 - Walnut Park

5 - Westmont/West Athens

6 - Willowbrook

7 - Other County Jurisdiction

  • ID – Unique Tree ID
  • AREA – Park Name or Area within Park
  • LOCATION - The tree's physical location in relation to public Right of Way and/or public space
  • QTY - Number of trees captured by the point
  • COMMON - Common name of tree species.
  • BOTANICAL - Scientific name, genus and species
  • DBH - Tree trunk diameter at breast height recorded to the nearest 1-inch
  • DBHRANGE - Tree trunk diameter range.

1 - 0-3 in

2 - 3-6 in

3 - 6-12 in

4 - 12-18 in

5 - 18-24 in

6 - 24-30 in

7 - 30-36 in

8 - 36-42 in

  • 9 - 42+ in
  • HEIGHT - Estimated tree height in feet
  • CANOPY - Canopy spread diameter (feet)
  • STEMS - Number of stems each tree has.

CONDITION - The general condition of each tree is recorded in one of the following categories

adapted from the rating system established by the International Society of

Arboriculture: Excellent 100%, Very Good 90%, Good 80%, Fair 60%, Poor40%, Critical 20%, Dead 0%

MAINTNEED - Maintenance categories:

  1. Priority 1 Removal. Trees designated for removal have defects that cannot be costeffectively or practically treated. The majority of the trees in this category have a large percentage of dead crown and pose an elevated level of risk for failure. Any hazards that could be seen as potential dangers to persons or property and seen as potential liabilities would be in this category. Large dead and dying trees that are high liability risks are included in this category. These trees are the first ones that should be removed.
  2. Priority 2 Removal. Trees that should be removed but do not pose a liability as great as the first priority will be identified here. This category would need attention as soon as "Priority One" trees are removed.
  3. Priority 3 Removal. Trees that should be removed, but that pose minimal liability to persons or property, will be identified in this category.
  4. Priority 1 Prune. Trees that require priority one pruning are recommended for trimming to remove hazardous deadwood, hangers, or broken branches. These trees have broken or hanging limbs, hazardous deadwood, and dead, dying, or diseased limbs or leaders greater than four inches in diameter.
  5. Priority 2 Prune. These trees have dead, dying, diseased, or weakened branches between two and four inches in diameter and are potential safety hazardso
  6. Large Tree Routine Prune. These trees require routine horticultural pruning to correct structural problems or growth patterns, which would eventually obstruct traffic or interfere with utility wires or buildings. Trees in this category are large enough to require bucket truck access or manual climbing.
  7. Small Tree Routine Prune. These trees require routine horticultural pruning to correct structural problems or growth patterns, which would eventually obstruct traffic or interfere with utility wires or buildings. These trees are small growing, mature trees that can be evaluated and pruned from the ground.
  8. Training Prune. Young, large-growing trees that are still small must be pruned to correct or eliminate weak, interfering, or objectionable branches in order to minimize future maintenance requirements. These trees, up to 20 feet in height, can be worked with a pole-pruner by a person standing on the ground.
  9. Stump Removal. This category indicates a stump that should be removed.
  10. Plant Tree. During the inventory, vacant planting sites will be identified by street and address. The size of the site is designated as small, medium, or large (indicating the ultimate size that the tree will attain), depending on the growing space available and the presence of overhead wires.
  • OBSERVATIO - General observations referring to a tree's health, structure, and location.
  • DAMAGE - Hardscape Damage. Notes damage to sidewalks and curbs by tree roots.
  • OVERHEADUT - Overhead Utilities. The inventory indicates whether overhead conductors or other utilities are present at the tree site that could result in conflicts with the tree.
  • GROWSPACE - Grow space. The area within the growing space is categorized as:

T - Tree Lawn

W - Well/Pit

M - Median

P - Raised Planter

0 - Open/Unrestricted

I - Island

U - Unmaintained Area

  • SPACESIZE - Space Size. The narrowest dimension of the Grow Space, in feet, such as 3'x3' cutout, 4' parkway strip, open parkland.
  • SPCODE - iTree Species Codes

 

Filelds below relate to GPS coordinates

  • GPS_DATE - Date
  • GPS_TIME - Time
  • UNFILT_POS
  • DATA_DICTI
  • GPS_WEEK
  • GPS_SECOND
  • GPS_HEIGHT
  • VERT_PREC
  • HORZ_PREC
  • NORTHING
  • EASTING

 


GIS Source Information
Database Name: eGIS_Environmental
Feature Class Name: PARKS_TREES
Feature Dataset Name (if applicable):
Reference Date:
Accuracy: Other
Update Frequency: Unknown
Access Constraints:None

Contact Information
Phillip George

County of Los Angeles
Department of Parks and Recreation



pgeorge@parks.lacounty.gov
(213) 351-1903

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