Geoscience Reference
In-Depth Information
a
50
45
40
35
30
25
20
15
10
5
0
Maumee
Ottawa
Swan
Duck
LE Tribs (incl.
Otter)
Study Area
Toussaint
River
b
90
80
70
60
50
40
30
20
10
0
Maumee
Ottawa
Swan
Duck
LE Tribs
(incl. Otter)
Study Area
Toussaint
River
Fig. 10.2 OEPA data 1993-1996 (a) Index of Biotic Integrity (IBI) and (b) Qualitative Habitat
Evaluation Index (QHEI) scores for all 11-digit HUCs in the Maumee AOC:Maumee River
(n
144 and n
32 respectively), Ottawa River (n
88 and n
64) Swan Creek (n
44 and
¼
¼
¼
¼
¼
n
19) Duck Creek (n
21 and n
14) Lake Erie Tribs including Otter Creek (n
57 and n
59)
¼
¼
¼
¼
¼
Tribs study area excluding Otter Creek (n
28 and n
30) Toussaint River (n
18 and n
13)
¼
¼
¼
¼
10.3.2 Public Satellite Data
Numerous data repositories freely distribute civilian satellite data to the public.
Among these are the University of Maryland Global Land Cover Facility (GLCF)
and Ohioview data consortium. Although satellite imagery is widely available for the
study area, very few images were available for the early 1990s. After examining all
available Landsat datasets from both sources, a May 16, 1992 Landsat 5 Thematic
Mapper (TM) dataset (path 20/row31) was downloaded from GLCF. In addition to
the TM Imagery, US Geological Survey 7.5 min Digital Ortho Quads (DOQ) were
used. These are mosaics with dates ranging from 1994 to 1995 were downloaded
from the USDA/NRCS Data Gateway. The 1 m spatial resolution DOQs were the
basis of training site selection and were used for collecting post-classification
“ground reference points” in the accuracy assessment of the land cover classification.
