updated - a report on the county of arlington’s existinggep.frec.vt.edu/utc/arlington utc update...
TRANSCRIPT
12/21/2009 1
Table 1: Existing UTC area and percentages for the County. *% Total Land Area includes area covered by water.
Updated - A Report on the County of Arlington’s Existing and Possible Urban Tree Canopy
UTC: Urban tree canopy (UTC) is the layer of leaves, branches, and stems of trees that cover the ground when viewed from above. Land Cover: Physical features on the earth mapped from sat-ellite or aerial imagery such as trees, or water. Existing UTC: The amount of UTC present within parcel boundaries. Possible UTC: The amount of land that is theoretically avail-able for the establishment of tree canopy within parcel boundaries. Possible UTC excludes areas covered by tree can-opy, roads, buildings, and water. It is the combination of Pos-sible UTC - Vegetation and Possible UTC - Impervious. Possible UTC - Vegetation: The amount of land that is theo-retically available for the establishment of tree canopy in non-tree vegetation areas within parcel boundaries. This excludes areas covered by tree canopy, impervious surfaces, and wa-ter. Possible UTC - Impervious: The amount of land that is theo-retically available for the establishment of tree canopy in impervious areas within parcel boundaries. This includes impervious areas (roads, parking lots, and sidewalks) except for buildings.
Key TermsKey Terms
Figure 1: Land cover for the County of Arlington.
Figure 1 shows the UTC analysis for Arlington, which is derived from high resolution aerial imagery. 6,353 acres of Arlington is covered by tree canopy (termed Existing UTC). This corresponds to 43% of the total land area within the County (Table 1). An additional 4010 acres of the county could theoretically be improved to support urban tree canopy (termed Possible UTC), Table 2.
How Much Tree Canopy Does How Much Tree Canopy Does
Arlington Have?Arlington Have?
Urban tree canopy (UTC) is the layer of leaves, branches, and stems of trees that cover the ground when viewed from above. Urban tree canopy provides many benefits to communities including improving water quality, conserving energy, lowering county temperatures, reducing air pollution, enhancing property values, providing wildlife habitat, facilitating social and educational opportunities, and providing aesthetic benefits.
Why is Tree Canopy Why is Tree Canopy
Important?Important?
UTC Classes Existing UTC
Acres % Total Land Area* % Land Area
Tree Canopy 6353.1 43.3% 43.5%
Non-Tree Vegetation 2504.2 17.1% 17.2%
Non-Building Impervious 4100.9 28.0% 28.1%
Buildings Impervious 1632.1 11.1% 11.2%
Water 72.6 0.5% 0.0%
Total Area 16701 100.0% 100.0%
The analysis of Arlington’s urban tree canopy (UTC) was carried out at the request of the Virginia Department of Forestry in collaboration with the County of Arlington and the Chesapeake Bay Program. The analysis was per-formed by the Virginia Geospatial Extension Program (VGEP) at Virginia Tech’s Department of Forest Resources and Environmental Conservation in consultation with the Spatial Analysis Laboratory (SAL) of the University of Vermont.
The goal of the project was to apply the USDA Forest Service’s UTC assess-ment protocols to the County of Arlington. This analysis was conducted based on year 2008 data.
In this update all federal lands have been removed from the analysis, so that all of the land area included may possibly be affected by Arlington County.
Project BackgroundProject Background
12/21/2009 2
Par
cels
Ex
isti
ng
UTC
Mapping Arlington’s TreesMapping Arlington’s Trees
Using high-resolution (1 meter) National Agriculture Imagery Pro-gram (NAIP) imagery acquired in the summer of 2008 (Figure 2a) in combination with remote sensing techniques, land cover data for the County was generated (Figure 2b). A 94% accuracy rate was found after conducting an accuracy assessment. Single trees with canopies larger than 16 square meters were detected.
Who “Owns” Arlington’s Trees?Who “Owns” Arlington’s Trees?
The detailed land cover mapping conducted as part of this assess-ment allowed the percentage of Existing and Possible UTC to be cal-culated for each parcel of land (Figure 3). Using this data, ownership patterns for Existing UTC and Possible UTC (Figure 4) can be exam-ined.
Figure 3: UTC metrics summarized at the property parcel level Figure 2a, 2b: Comparison of 2008 NAIP imagery to the resulting high-resolution land cover.
Land Cover Derived from 2008 NAIP Imagery (1m)
2008 NAIP Imagery (1m)
Po
ssib
le U
TC
12/21/2009 3
Figure 4: Existing UTC mapped using Non-Federal property parcels provided by the County of Arlington.
12/21/2009 4
Using the parcel data provided by the County of Arlington, Existing and Possible UTC were summarized by property parcels with federally owned parcels removed. This summary excludes any area outside of non-federally owned property parcel boundaries and areas covered by water. Figure 4 shows Existing UTC through out the County of Arlington summarized by non-federal property parcels. Arlington has 48% (5,174 acres) Existing UTC and 37% (4,009 acres) Possible UTC, table 2. Possible UTC has two components, Possible UTC - Vegetation and Possible UTC - Impervious. 18% (1,899 acres) of parcel land area is associated with Possible UTC - Vegetation. 20% (2,110 acres) of parcel land area is associated with Possible UTC - Impervious (Figure 5).
Urban Tree Canopy Summarized by NonUrban Tree Canopy Summarized by Non--
Federally Owned Property ParcelsFederally Owned Property Parcels Urban Tree Canopy Summarized by Zoning Urban Tree Canopy Summarized by Zoning
CategoriesCategories
Figure 6a: UTC metrics summarized by zoning categories with more than 400 acres of land area (not including water area) which comprises 83% (11,987 acres) of the land area in zoning.
Figure 5: Pie chart showing Arlington UTC distribution within non-federally owned parcels.
0 500 1000 1500 2000 2500 3000 3500 4000 4500
Special District: S-3A
One-Family, Restricted Two Family Dwelling District: R-5
One-Family Dwelling District: R-10
One-Family Dwelling District: R-8
One-Family Dwelling District: R-6
Apartment Dwelling District: RA14-26
Apartment Dwelling District: RA8-18
Apartment Dwelling District: RA6-15
Acres
Possible UTC Area
Possible Area-Vegetation
Possible Area-Impervious
Existing UTC Area
Land Area
48%
18%
20%
15%
Existing UTC Possible UTC - VegetationPossible UTC - Impervious Not Suitable for UTC
Using the zoning data provided by the County of Arlington, Existing and Possible UTC were summarized by zoning category (pages 4 - 8). This summary excludes any area outside the analysis boundary and areas covered by water. The zoning category One-Family Dwell-ing District: R-6 has the largest amount of land area with 4,319 acres and the largest amount of Existing UTC, 33.9% (Table 3a). Special District: S3-A and One-Family Dwelling District: R-10 are 2nd (22.2%) and 3rd (17.5%) in Existing UTC respectively. Figure 6a and 6b compare zoning categories by the amount of land area within the categories. Figure 6a compares zoning categories that have more than 400 acres, which comprises 83% of the land area. Figure 6b compares zones with less than 400 acres of land area (17% of the land area). Figure 7 shows Possible UTC by zoning category for the County.
UTC Parcel Metrics Acres % Parcel Land Area
Parcel Land Area 10810.0 100.0%
Existing UTC 5173.9 47.9%
Possible UTC 4009.1 37.1%
Possible UTC - Vegetation 1898.7 17.6%
Possible UTC - Impervious 2110.4 19.5%
Not Suitable for UTC* 1626.9 15.1%
Table 2: Acres and percent land area from UTC metrics summarized by non-federally owned property parcels.
*Not Suitable for UTC includes all Building Impervious areas within the parcel boundaries.
12/21/2009 5
Figure 6b: UTC metrics summarized by zoning with less than 400 acres of land area (not including water area) which comprises 17% (2,436 acres) of the land area.
Urban Tree Canopy Summarized by Arlington’s Zoning CategoriesUrban Tree Canopy Summarized by Arlington’s Zoning Categories
0 50 100 150 200 250 300
Two-Family and Town House Dwelling District: R2-7
Special Development District: S-D
Service Industrial District: M-2
Service Commercial - Community Business Districts: C-2
Restricted Local Commercial District: C-1-R
Residential Town House Dwelling District: R15-30T
Public Service District: P-S
One-Family Dwelling District: R-20
One Family Residential-Town-House Dwelling District: R-10T
Multiple-Family Dwelling and Hotel District: RA-H-3.2
Mixed Use-Virginia Square: MU-VS
Local Commercial District: C-1
Limited Industrial District: CM
Limited Commercial - Professional Office Building District: C-1-O
Light Industrial District: M-1
Hotel District: RA-H
General Commercial District: C-3
C-O-ROSSLYN: C-O-ROSS
Commercial Town House District: C-TH
Commercial Redevelopment District: C-R
Commercial Office Building, Hotel and Apartment District: C-O-2.5
Commercial Office Building, Hotel and Apartment District: C-O-1.5
Commercial Office Building, Hotel and Apartment District: C-O-1.0
Commercial Off. Bldg, Hotel and Multiple-Family Dwelling: C-O
Commercial Off. Bldg, Hotel and Apartment District: C-O-A
Columbia Pike - Form Based Code District: CP-FBC
Apartment Dwelling District: RA7-16
Apartment Dwelling District: RA4.8
Apartment Dwelling and Commercial District: RC
Acres
Possible UTC Area
Possible Area-Vegetation
Possible Area-Impervious
Existing UTC Area
Land Area
12
/2
1/2
00
9
6
Zon
ing
Cat
ego
ry
Lan
d A
rea
(Acr
es)
Exis
tin
g U
TC
Po
ssib
le U
TC V
eget
atio
n
Po
ssib
le U
TC Im
pe
rvio
us
% L
and
A
rea
% Z
on
ing
Cat
ego
ry
% U
TC
Typ
e
% L
and
A
rea
% Z
on
ing
Cat
ego
ry
% U
TC
Typ
e
% L
and
A
rea
% Z
on
ing
Cat
ego
ry
% U
TC
Typ
e
Ap
artm
en
t D
we
llin
g an
d C
om
me
rcia
l Dis
tric
t: R
C
41
0
.03
%
10
.31
%
0.0
7%
0
.02
%
5.8
9%
0
.10
%
0.1
1%
3
8.0
6%
0
.34
%
Ap
artm
en
t D
we
llin
g D
istr
ict:
RA
4.8
6
2
0.0
8%
1
8.8
1%
0
.19
%
0.0
3%
7
.39
%
0.1
9%
0
.19
%
43
.91
%
0.6
0%
Ap
artm
en
t D
we
llin
g D
istr
ict:
RA
6-1
5 4
07
0
.76
%
27
.07
%
1.7
6%
0
.39
%
13
.67
%
2.2
5%
1
.30
%
46
.05
%
4.1
0%
Ap
artm
en
t D
we
llin
g D
istr
ict:
RA
7-1
6 1
09
0
.26
%
33
.85
%
0.5
9%
0
.12
%
16
.12
%
0.7
1%
0
.30
%
39
.05
%
0.9
3%
Ap
artm
en
t D
we
llin
g D
istr
ict:
RA
8-1
8 5
23
1
.07
%
29
.58
%
2.4
7%
0
.56
%
15
.55
%
3.2
8%
1
.54
%
42
.59
%
4.8
7%
Ap
artm
en
t D
we
llin
g D
istr
ict:
RA
14
-26
75
9
2.1
9%
4
1.5
9%
5
.04
%
0.8
3%
1
5.7
4%
4
.83
%
1.8
9%
3
5.9
7%
5
.97
%
Co
lum
bia
Pik
e -
Fo
rm B
ase
d C
od
e D
istr
ict:
CP
-FB
C
2
0.0
1%
3
7.0
7%
0
.01
%
0.0
0%
2
5.5
7%
0
.02
%
0.0
1%
4
3.8
2%
0
.02
%
Co
mm
erc
ial O
ff. B
ldg,
Ho
tel a
nd
Ap
artm
en
t D
istr
ict:
C-O
-A
42
0
.02
%
5.2
2%
0
.03
%
0.0
0%
1
.02
%
0.0
2%
0
.11
%
37
.85
%
0.3
5%
Co
mm
erc
ial O
ff. B
ldg,
Ho
tel a
nd
Mu
ltip
le-F
amily
Dw
ellin
g: C
-O
21
2
0.0
9%
6
.42
%
0.2
2%
0
.09
%
6.3
1%
0
.54
%
0.6
2%
4
2.4
8%
1
.97
%
Co
mm
erc
ial O
ffic
e B
uild
ing,
Ho
tel a
nd
Ap
artm
en
t D
istr
ict:
C-O
-1.0
2
2
0.0
3%
2
3.0
6%
0
.08
%
0.0
1%
8
.78
%
0.0
8%
0
.06
%
41
.54
%
0.2
0%
Co
mm
erc
ial O
ffic
e B
uild
ing,
Ho
tel a
nd
Ap
artm
en
t D
istr
ict:
C-O
-1.5
1
92
0
.21
%
15
.44
%
0.4
7%
0
.24
%
17
.76
%
1.3
8%
0
.68
%
51
.10
%
2.1
5%
Co
mm
erc
ial O
ffic
e B
uild
ing,
Ho
tel a
nd
Ap
artm
en
t D
istr
ict:
C-O
-2.5
2
25
0
.16
%
10
.48
%
0.3
8%
0
.14
%
9.2
0%
0
.84
%
0.7
0%
4
4.6
7%
2
.19
%
Co
mm
erc
ial R
ed
eve
lop
me
nt
Dis
tric
t: C
-R
14
0
.00
%
3.4
7%
0
.01
%
0.0
0%
3
.53
%
0.0
2%
0
.03
%
29
.25
%
0.0
9%
Co
mm
erc
ial T
ow
n H
ou
se D
istr
ict:
C-T
H
6
0.0
0%
8
.00
%
0.0
1%
0
.00
%
10
.23
%
0.0
3%
0
.02
%
34
.52
%
0.0
5%
C-O
-RO
SSLY
N: C
-O-R
OSS
1
3
0.0
0%
1
.80
%
0.0
0%
0
.00
%
0.8
2%
0
.00
%
0.0
3%
2
9.5
5%
0
.09
%
Ge
ne
ral C
om
me
rcia
l Dis
tric
t: C
-3
64
0
.03
%
7.0
2%
0
.07
%
0.0
3%
5
.83
%
0.1
5%
0
.18
%
39
.93
%
0.5
6%
Ho
tel D
istr
ict:
RA
-H
30
0
.02
%
8.9
5%
0
.04
%
0.0
1%
6
.18
%
0.0
8%
0
.13
%
59
.74
%
0.3
9%
Ligh
t In
du
stri
al D
istr
ict:
M-1
8
7
0.0
5%
9
.03
%
0.1
3%
0
.04
%
6.9
5%
0
.24
%
0.3
4%
5
6.4
6%
1
.07
%
Lim
ite
d C
om
me
rcia
l - P
rofe
ssio
nal
Off
ice
Bu
ildin
g D
istr
ict:
C-1
-O
3
0.0
0%
2
6.6
2%
0
.01
%
0.0
0%
1
1.0
5%
0
.01
%
0.0
1%
4
0.5
9%
0
.02
%
Lim
ite
d In
du
stri
al D
istr
ict:
CM
3
8
0.0
3%
9
.78
%
0.0
6%
0
.04
%
15
.79
%
0.2
4%
0
.15
%
55
.06
%
0.4
6%
Loca
l Co
mm
erc
ial D
istr
ict:
C-1
9
0
0.0
5%
8
.00
%
0.1
2%
0
.04
%
6.3
9%
0
.23
%
0.2
9%
4
6.4
0%
0
.91
%
Mix
ed
Use
-Vir
gin
ia S
qu
are
: MU
-VS
1
0.0
0%
0
.00
%
0.0
0%
0
.00
%
0.0
0%
0
.00
%
0.0
0%
2
4.7
3%
0
.01
%
Mu
ltip
le-F
amily
Dw
elli
ng
and
Ho
tel D
istr
ict:
RA
-H-3
.2
70
0
.05
%
11
.00
%
0.1
2%
0
.04
%
7.8
3%
0
.22
%
0.1
8%
3
6.5
7%
0
.56
%
On
e-F
amily
Dw
elli
ng
Dis
tric
t: R
-6
43
19
14
.75
%
49
.26
%
33
.95
%
5.5
4%
1
8.4
9%
3
2.2
6%
8
.70
%
29
.07
%
27
.46
%
Urb
an T
ree
Can
op
y Su
mm
ariz
ed b
y Zo
nin
g C
ateg
ori
esU
rban
Tre
e C
ano
py
Sum
mar
ized
by
Zon
ing
Cat
ego
ries
% U
TC T
ype
=
Are
a o
f U
TC
typ
e fo
r sp
ecif
ied
lan
d u
se
Are
a o
f a
ll U
TC
typ
e
% L
and
=
Are
a o
f U
TC
typ
e fo
r sp
ecif
ied
lan
d u
se
Are
a o
f a
ll la
nd
The
% L
and
Use
val
ue
of
49.
26%
ind
icat
es t
hat
49
.26%
of
“On
e-F
amily
Dw
elli
ng
Dis
tric
t: R
-6”
lan
d is
co
vere
d b
y tr
ee c
ano
py.
Th
e %
UTC
Typ
e va
lue
of
33
.95
% in
dic
ates
th
at 3
3.9
5%
of
all E
xist
ing
UTC
lies
in
area
s o
f “O
ne
-Fam
ily D
wel
ling
Dis
tric
t: R
-6”
lan
d u
se.
% C
ate
gory
=
Are
a o
f U
TC
typ
e fo
r sp
ecif
ied
lan
d u
se
Are
a o
f a
ll la
nd
fo
r sp
ecif
ied
lan
d u
se
The
% C
ate
gory
val
ue
of
14
.75
% i
nd
icat
es t
hat
14.
75%
of
Arl
ingt
on
’s la
nd
are
a is
tre
e c
ano
py
in a
reas
wh
ere
the
lan
d u
se i
s “O
ne
-Fam
ily D
we
llin
g D
istr
ict:
R-
6”.
Tab
le 3
a:
UTC
met
rics
by
typ
e, s
um
ma
rize
d b
y zo
nin
g c
ate
go
ries
. F
or
each
zo
ne,
ca
teg
ory
UTC
met
rics
wer
e co
mp
ute
d a
s a
per
cen
t o
f a
ll zo
ned
lan
d in
th
e C
ou
nty
(%
La
nd
Are
a),
as
a p
erce
nt
of
lan
d a
rea
by
zon
ing
ca
teg
ori
es (
% Z
on
ing
Ca
teg
ory
) a
nd
as
a p
erce
nt
of
the
are
a f
or
the
UTC
typ
e (%
UTC
Typ
e).
12
/2
1/2
00
9
7
Urb
an T
ree
Can
op
y Su
mm
ariz
ed b
y Zo
nin
g C
ateg
ori
es C
on
tin
ued
Urb
an T
ree
Can
op
y Su
mm
ariz
ed b
y Zo
nin
g C
ateg
ori
es C
on
tin
ued
Tab
le 3
b :
UTC
met
rics
by
typ
e, s
um
ma
rize
d b
y zo
nin
g c
ate
go
ries
. Fo
r ea
ch z
on
e, c
ate
go
ry U
TC m
etri
cs w
ere
com
pu
ted
as
a p
erce
nt
of
all
zon
ed la
nd
in t
he
Co
un
ty (
% L
an
d A
rea
), a
s a
per
cen
t o
f la
nd
are
a b
y zo
nin
g c
ate
go
ries
(%
Zo
nin
g C
ate
go
ry)
an
d a
s a
per
cen
t o
f th
e a
rea
fo
r th
e U
TC t
ype
(% U
TC T
ype)
.
Zon
ing
Cat
ego
ry
Lan
d A
rea
(Acr
es)
Exis
tin
g U
TC
Po
ssib
le U
TC V
eget
atio
n
Po
ssib
le U
TC Im
pe
rvio
us
% L
and
A
rea
% Z
on
ing
Cat
ego
ry
% U
TC
Typ
e
% L
and
A
rea
% Z
on
ing
Cat
ego
ry
% U
TC
Typ
e
% L
and
A
rea
% Z
on
ing
Cat
ego
ry
% U
TC
Typ
e
On
e-F
amily
Dw
elli
ng
Dis
tric
t: R
-8
56
3
2.1
4%
5
4.9
5%
4
.94
%
0.6
2%
0
.62
%
0.6
2%
0
.96
%
24
.67
%
3.0
4%
On
e-F
amily
Dw
elli
ng
Dis
tric
t: R
-10
2
02
5 7
.64
%
54
.40
%
17
.58
%
2.5
2%
2
.52
%
2.5
2%
3
.68
%
26
.22
%
11
.61
%
On
e-F
amily
Dw
elli
ng
Dis
tric
t: R
-20
2
50
1
.21
%
69
.79
%
2.7
9%
0
.20
%
0.2
0%
0
.20
%
0.3
2%
1
8.3
0%
1
.00
%
On
e F
amily
Re
sid
en
tial
-To
wn
-Ho
use
Dw
elli
ng
Dis
tric
t: R
-10
T 8
3
0.2
4%
4
1.2
2%
0
.54
%
0.0
7%
0
.07
%
0.0
7%
0
.17
%
29
.91
%
0.5
4%
On
e-F
amily
, Re
stri
cte
d T
wo
Fam
ily D
we
llin
g D
istr
ict:
R-5
4
97
1
.49
%
43
.10
%
3.4
2%
0
.61
%
0.6
1%
0
.61
%
1.0
5%
3
0.3
6%
3
.30
%
Pu
blic
Se
rvic
e D
istr
ict:
P-S
1
08
0
.10
%
13
.93
%
0.2
4%
0
.15
%
0.0
5%
0
.00
%
0.4
9%
6
6.1
6%
1
.56
%
Re
sid
en
tial
To
wn
Ho
use
Dw
ellin
g D
istr
ict:
R1
5-3
0T
61
0
.10
%
24
.51
%
0.2
4%
0
.05
%
0.0
0%
0
.12
%
0.1
6%
3
7.6
1%
0
.50
%
Re
stri
cte
d L
oca
l Co
mm
erc
ial D
istr
ict:
C-1
-R
3
0.0
0%
6
.85
%
0.0
0%
0
.00
%
0.1
2%
0
.03
%
0.0
1%
4
7.3
0%
0
.03
%
Serv
ice
Co
mm
erc
ial -
Co
mm
un
ity
Bu
sin
ess
Dis
tric
ts: C
-2
26
0
0.1
6%
8
.76
%
0.3
6%
0
.12
%
0.0
3%
0
.04
%
0.8
0%
4
4.6
7%
2
.54
%
Serv
ice
Ind
ust
rial
Dis
tric
t: M
-2
15
0
.01
%
11
.55
%
0.0
3%
0
.03
%
0.0
4%
4
.24
%
0.0
7%
6
4.9
6%
0
.22
%
Spe
cial
De
velo
pm
en
t D
istr
ict:
S-D
5
1
0.1
0%
2
8.2
5%
0
.23
%
0.0
4%
4
.24
%
0.3
3%
0
.14
%
38
.98
%
0.4
4%
Spe
cial
Dis
tric
t: S
-3A
2
89
4 9
.65
%
48
.08
%
22
.21
%
4.2
4%
0
.33
%
0.0
0%
5
.63
%
28
.08
%
17
.77
%
Two
-Fam
ily a
nd
To
wn
Ho
use
Dw
elli
ng
Dis
tric
t: R
2-7
2
82
0
.69
%
35
.48
%
1.6
0%
0
.33
%
0.0
0%
0
.00
%
0.6
7%
3
4.0
6%
2
.10
%
12/21/2009 8
Figure 7: Possible percentage increase of UTC mapped using zoning categories provided by the County of Arlington.
12/21/2009 9
Decision makers can use GIS to find out specific UTC metrics for a parcel or zoning category. This information can be used to estimate the amount of tree loss in a planned development or set UTC improve-ment goals for an area.
Jennifer McKee Geospatial Project Developer Virginia Geospatial Extension Program Department of Forest Resources and Environmental Conservation Virginia Tech 540-231-9115, [email protected] http://www.gep.frec.vt.edu
Prepared by:Prepared by: Additional InformationAdditional Information
The study was conducted with funding from the Virginia Department of Forestry. More information on the UTC as-sessment project can be found at the following web site. http://nrs.fs.fed.us/urban/utc/ http://www.gep.frec.vt.edu/va_utc.html
Where to Plant Trees?Where to Plant Trees?
Figure 8: Parcel-based UTC metrics can be used to support targeted UTC.
GIS Database
Arlington’s urban tree canopy is a vital community asset, reducing stormwater runoff, improving air quality, reducing the County’s carbon footprint, enhancing quality of life, contributing to savings on energy bills, and serving as habitat for wildlife.
With 43.5% canopy coverage of all land area within the county, Arlington has similar coverage as Charlottesville, Fairfax County, and Lexington. Figure 9 shows how Arlington compares to other Virginia localities participating in Urban Tree Canopy Assessments.
When summarized by property parcels, Arlington has 48% Existing UTC with only 28% of all parcels with less than 30% canopy coverage.
74% (4,621 acres) of the Existing UTC is located within the following zoning categories: One-Family Dwelling District: R-6, Special District: S-3A, and One-Family Dwelling District: R-10.
Conclusions Conclusions
Figure 9: Comparison of Existing UTC of % land area (excludes water area) with other Virginia localities that have completed UTC assessments.
44%47%
41%
27%
44%
58%
27% 26%
20%
27%
0%
10%
20%
30%
40%
50%
60%
Exis
tin
g U
TC