Tree inventory analysis

​In the past few years, the Village of Norridge has contracted a
company to come out and take an inventory of all the trees within the
village limits. In addition to the location of each tree, the company
inventoried the species, trunk size, health, and other descriptive
information. Although the database that was created from the information
has been useful, the village was looking to better utilize the
information.

The GIS specialist was asked to map out each tree location using
address information from the database and aerial photography. A point
was placed for each tree in the right of way in front of the address
listed in the database. The point was then moved to the location of the
tree by using the aerial photography to narrow down where in front of
the lot the tree was located. For areas with multiple trees on the same
lot, special location instructions were included in the database. By
mapping out each location, the village was able to get a visual
representation of the tree dispersion.

With each tree now visible on a map, the village was able to
determine what areas were lacking trees and should be the focus of any
future plantings. The village was also able to see a visual
representation of any tree that are susceptible to diseases i.e. elms
and ash trees, allowing them to see what areas of the village would be
most affected. By using GIS, the Village of Norridge was able to get a
different perspective on already existing information. This new
information has allowed them to make informed decisions on the future of
the village’s trees.

Tree inventory analysis

​In the past few years, the Village of Norridge has contracted a
company to come out and take an inventory of all the trees within the
village limits. In addition to the location of each tree, the company
inventoried the species, trunk size, health, and other descriptive
information. Although the database that was created from the information
has been useful, the village was looking to better utilize the
information.

The GIS specialist was asked to map out each tree location using
address information from the database and aerial photography. A point
was placed for each tree in the right of way in front of the address
listed in the database. The point was then moved to the location of the
tree by using the aerial photography to narrow down where in front of
the lot the tree was located. For areas with multiple trees on the same
lot, special location instructions were included in the database. By
mapping out each location, the village was able to get a visual
representation of the tree dispersion.

With each tree now visible on a map, the village was able to
determine what areas were lacking trees and should be the focus of any
future plantings. The village was also able to see a visual
representation of any tree that are susceptible to diseases i.e. elms
and ash trees, allowing them to see what areas of the village would be
most affected. By using GIS, the Village of Norridge was able to get a
different perspective on already existing information. This new
information has allowed them to make informed decisions on the future of
the village’s trees.