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Special Purpose Imagery
The following are ad hoc-generated images for special projects, grouped by
geographic region. Note: some of the linked images are large georeferenced JPG files
that have been compressed using the tar and
gzip utilities.
Full resolution Landsat imagery is available from
USGS.
MODIS imagery is available from NASA.
North Central Region |
The James River at LaMoure, ND is still above flood
stage. This Thematic Mapper image from Landsat 5 was
taken at the crest of the flooding on April 19, 2009.
TM bands 4-3-2 are displayed as RGB.
As of 3pm April 22, the river is receding at 15.31 ft,
still above the nominal flood stage of 14'.
The scene is GIS-ready with the additional
.jgw file.
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This Thematic Mapper image of the James River is from
Landsat 5, taken April 19, 2009. The RGB band combination
is 7-5-3, chosen from this margin image to best delineate
the extent of water over land. The scene is GIS-ready with
the additional .jgw file.
Text of the latest warning:
THE FLOOD WARNING CONTINUES FOR
THE JAMES RIVER NEAR COLUMBIA
- UNTIL FURTHER NOTICE...
- AT 09AM WEDNESDAY THE STAGE WAS 19.7 FEET...
- RECORD FLOODING IS OCCURRING AND RECORD FLOODING IS FORECAST...
- FLOOD STAGE IS 13.0 FEET...
- THE RIVER ROSE ABOVE FLOOD STAGE AND WILL CONTINUE RISING TO NEAR
19.8 FEET BY THIS EVENING. THE RIVER SHOULD BEGIN FALLING THE
THE MORNING OF MONDAY MAY 4 2009.
- AT 19.6 FEET...THE WATER OVERTOPS THE LEVEE AT THE PARK IN
COLUMBIA..
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This annotated MODIS scene from April 14th shows the flood extent and
also shows Devils Lake as well. The scene is GIS-ready with the
additional
.jgw
file.
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This is a scene from a Landsat overpass on April 10th, showing the
flooded areas from Grand Forks northwards into Canada. A full resolution
(30m) georegistered jpg image suitable for importing into a GIS can be
found here (20 MB).
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This is an annotated MODIS image from April 9th showing the regional
flooding overlain by forecast points. Of note are the flood pools above
Fargo, Grand Forks, and Pembina; the scale of the flooded area in
comparison to Lake Superior; and the remaining snowpack south of Fargo
and in the tributaries to the west. This is not a swollen river; this
is a series of lakes.
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This is a scene from a Landsat overpass on April 3rd. A full resolution
(30m) georegistered jpg image suitable for importing into a GIS can be
found here (33 MB).
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This is a scene from a Landsat overpass on April 3rd. A full resolution
(30m) georegistered jpg image suitable for importing into a GIS can be
found here (29 MB).
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This moderate resolution image shows the broader region including the
similar snow-free/inundated area south of Fargo. This image supports the
talking point that there is substantial snow through the area still to be
melted.
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This high resolution image shows Fargo and the area immediately north.
The darest areas along the channel are clearly inundated. The snow-free
area north of Fargo was mapped as inundated on Mar 30. The recent
snowfall most likely hit shallow standing water or very wet ground and
melted on impact. This image supports the talking point that storage
areas are full.
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This is a Canadian RadarSAT image of the Grand Forks area from March 28.
RadarSAT is not affected by cloud cover. See the legend for an
explanation of how to interpret the colors in this image. Interpretation
is qualitative only - basically pink/magenta is standing water, as it
fades to blue/purple there is varying moisture and snow cover,
green-cyan is likely bare fields, yellow is rougher bare fields, and
red is very rough, probably buildings. If you try to just pay attention
to the pink-magenta darkening to blue/purple, you're seeing standing
water or very wet areas.
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Southeast Region |
The crest was 15.29', over the flood stage of 13.0'
and is current at 14.88'. The channels used in the
RGB image were 7-5-3, with the infra-red chosen to accent
the extent of flooding. This Landsat TM scene is
GIS-ready with the additional .jgw file.
Landsat ID: L5017038_03820090424EDC00
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The crest was 77.29', over the flood stage of 74.5'
and is currently at 76.27'. The channels used in the
RGB image were 7-5-3, with the infra-red chosen to accent
the extent of flooding. This Landsat TM scene is
GIS-ready with the additional .jgw file.
Landsat ID: L5017038_03820090424EDC00
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The river is receding, down to 12.49 ft from a peak
of 14.36'. Flood stage is 13'. This image is from
the Landsat 5 satellite, displaying bands 4/3/2 as
R/G/B. The scene is GIS-ready with the additional
.jgw file.
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The river is receding, down to 16.45 ft from a peak
of 19.57'. This image is from the Landsat 5 satellite,
taking bands 4/3/2 as R/G/B. The scene is GIS-ready with
the additional .jgw file.
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