Remote Sensing and Internet Data Sources
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Transcript of Remote Sensing and Internet Data Sources
Remote Sensing and Internet Data Sources
Unit 3: Module 12, Lecture 3 – Remote Autonomous Vehicles/On-line data resources
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Subsurface vehicles and sensors
In large water bodies, towed or autonomous vehicles can be used to record data over large areas Towed systems Remotely operated
vehicles Autonomous vehicles
These use a combination of remote sensors (Sonar, hydroacoustics) and probes (on-board sensors)
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•Provided by Jack Kelly, Mid-Continent Ecology Division, U.S. EPA, Duluth MN
EPA-MED Duluth: Tow-Yo
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EPA Lake Guardian with sonar and towed sensor
•Provided by Jack Kelly•Mid-Continent Ecology Division
•U.S. EPA, Duluth MN
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Result is semi-synoptic, spatially-referenced data to characterize: Water properties (including biology)
Bathymetry and sediment character
Typically sample at 4-5 knots, to ~100 km per day
•Provided by Jack Kelly•Mid-Continent Ecology Division
•U.S. EPA, Duluth MN
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•Provided by Jack Kelly, Mid-Continent Ecology Division, U.S. EPA, Duluth MN
Tow-yo shoreline sampling: Tributary receiving waters
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•Provided by Jack Kelly, Mid-Continent Ecology Division•U.S. EPA, Duluth MN
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Remotely Operated Vehicles (ROV)
Jason II/ Medea Woods Hole ROV 2 body system
Medea – intermediate vehicle to decouple Jason from surface motion
6500 m capabilities
Mosaic of images shot from Jason showing the variety of sampling devices
Jonathan Howland WHOI
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Autonomous Underwater Vehicles
Powered free ranging sensors Capable of deep water sampling, long
distances, inclement conditions
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REMUS – Remote Environmental Monitoring Units
Wood’s Hole OI 52 inches long 80 lbs Configured to
support a variety of sensors
Salt or fresh water
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REMUS – Remote Environmental Monitoring Units
Sensors Acoustic Doppler Current
Profiler Sidescan Sonar Fluorometer Bioluminescence sensor Plankton pump Video camera
Windows XP interface
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Larger units - Univ. South Florida AUV
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Integrated Ocean Observing System
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Internet Sources of Spatial data
•http://nmviewogc.cr.usgs.gov/viewer.htm
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Land Use/Land Cover
Many different land use data sets LUDA AVHRR GAP Landsat
Two important attributes Spatial Resolution Classification
Resolution
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AVHRR Land Cover
AVHRR (Advanced Very High Resolution Radiometer)
1 km pixel resolution
Nationwide coverage
2 images/day Good for a
“coarse picture” of the regional landscape
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USGS LULC (Land Use/Land Cover)
Based on aerial photographs 1970s and 1980s
21 cover type categories 40 ac minimum map unit Based on 1:100,000 and
1:250,000 USGS quadrangles
Free
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Land Use/Land Cover: Level II codes
code = "11" Residential
code = "12" Commercial and services
code = "13" Industrial
code = "14" Transportation, communications, and utilities
code = "15" Industrial and commercial complexes
code = "16" Mixed urban or built-up land
code = "17" Other built-up land
code = "21" Cropland and pasture
code = "22" Orchards, groves, vineyards, nurseries and
ornamental horticultural areas code = "23"
Confined feeding operations code = "24"
Other agricultural land code = "41"
Deciduous forest land code = "42"
Evergreen forest land code = "43"
Mixed forest land
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National Land Cover Dataset (NCLD)
Nationwide coverage Derived from early-
mid 1990s Landsat Thematic Mapper imagery
30 m resolution 21 classes (modified
Anderson Level II) 2001 NLCD data now
available
•http://landcover.usgs.gov/images/glensfalls_web.jpg
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Transportation and Infrastructure
Major roads County roads Township
roads City streets Railroads Pipelines Airports
Source: TIGER data
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Hydrography: water resources
Lakes Wetlands
By wetland type Emergent Forested Scrub/shrub, etc
Streams Rivers FEMA Floodplain Well locations Watershed boundaries
Internet Map Server session for a wetland inventory of the Poplar River watershed, north shore of Lake Superior
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Census data
Maintained by US Census Bureau
Data available in Blocks Tracts Other divisions
Summarized by Population Demographics Congressional
districts, others•Census tracts, St. Louis Co, MN
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Digital Elevation Models (DEMs)
Pixel-based data describing elevations
Typically 30 m resolution Used for
Slope calculations Generating contours Watershed delineations Hydrologic modeling
Flow direction Flow distance
Viewshed analyses Hillshades
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Easy GIS – accessing on-line data
Be sure to visit
DuluthStreams
And LakeAccess!
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Metadata: data about data
Important to understand where your data came from – metadata
Identification_Information Citation Citation_Information Originator: NOAA Coastal Services Center Publication_Date: 19971131 Title: Hurricane Storm Surge Geospatial_Data_Presentation_Form: Map Publication_Information Publication_Place: Charleston, SC Publisher: NOAA Coastal Services Center Larger_Work_Citation Citation_Information