thinking globally about our environmentthinking globally: part 2 -1 thinking globally about our...
Post on 18-Sep-2020
21 Views
Preview:
TRANSCRIPT
Thinking Globally: part 2 - 1
Thinking GloballyThinking GloballyThinking GloballyThinking Globally
about our environmentabout our environmentabout our environmentabout our environment
Part 2. Collecting, processing Part 2. Collecting, processing Part 2. Collecting, processing Part 2. Collecting, processing
and displaying dataand displaying dataand displaying dataand displaying data
Thinking Globally: part 2 - 2
Collecting data
What is a ‘GIS’?a ‘GIS’?a ‘GIS’?a ‘GIS’?
o LandsatLandsatLandsatLandsat
o Earth Observatory SystemEarth Observatory SystemEarth Observatory SystemEarth Observatory System
What is a ‘GPS’?
Thinking Globally: part 2 - 3
Geographic
Information System
A geographic information system (GIS) is a
system designed to capture, store, manipulate,
analyze, manage, and present all types of
spatial or geographical data.
GIS can relate unrelated information by using
location as the key index variable. Locations or
extents in the Earth space-time may be
recorded as dates/times of occurrence, and x,
y, and z coordinates representing longitude,
latitude, and altitude.
Thinking Globally: part 2 - 4
A constellation of observatories
Thinking Globally: part 2 - 5
Landsat
Satellite imagery of Earth’s Satellite imagery of Earth’s Satellite imagery of Earth’s Satellite imagery of Earth’s
surfacesurfacesurfacesurface
landsat.usgs.govlandsat.usgs.govlandsat.usgs.govlandsat.usgs.gov
Thinking Globally: part 2 - 6
Sun-synchronous
satellite orbit
Thinking Globally: part 2 - 7
Sun-synchronous
satellite orbit
Thinking Globally: part 2 - 8
Sun-synchronous
satellite orbit
Thinking Globally: part 2 - 9
Earth Observatory
System
NASA’s Earth Observatory NASA’s Earth Observatory NASA’s Earth Observatory NASA’s Earth Observatory SystemSystemSystemSystem
Great maps for global Great maps for global Great maps for global Great maps for global presepectivepresepectivepresepectivepresepective
http://eospso.nasa.govhttp://eospso.nasa.govhttp://eospso.nasa.govhttp://eospso.nasa.gov////
https://earthobservatory.nasa.govhttps://earthobservatory.nasa.govhttps://earthobservatory.nasa.govhttps://earthobservatory.nasa.gov////
Thinking Globally: part 2 - 10
https://earthobservatory.nasa.gov/
Jan 30, 2019—why we don’t have class this week
Thinking Globally: part 2 - 11
Earth Observation System
Satellite Database
Data Analysis
Carbon Models
Carbon Accounts
WWW
Markets
Buyers
Carbon Sellers
Thinking Globally: part 2 - 12
GPS
The Global Positioning System (GPS) is a
space-based satellite-navigation system
that provides location and time information
in all weather conditions, anywhere on or
near the Earth where there is an
unobstructed line of sight to four or more
GPS satellites.
www.gps.govwww.gps.govwww.gps.govwww.gps.gov
Thinking Globally: part 2 - 13
Thinking Globally: part 2 - 14
How GPS works
Imagine you are standing
somewhere on Earth with three
satellites in the sky above you. If
you know how far away you are
from satellite A, then you know
you must be located somewhere
on the red circle. If you do the
same for satellites B and C, you
can work out your location by
seeing where the three circles
intersect. This is just what your
GPS receiver does, although it
uses overlapping spheres rather
than circles.
Thinking Globally: part 2 - 15
How GPS works (2)
Your cell phone can receive
signals from various satellites. It
decodes the time and location of
the sender. Then it calculates the
distance of the sender. From 3
satellites it can detect ‘x,y’
location. With a 4th satellite it can
determine ‘height’.
The coordinate system is
‘spherical’ in 3d, meaning there
are 2 angles and a radial
distance.
Thinking Globally: part 2 - 16
Thinking GloballyThinking GloballyThinking GloballyThinking Globally
about our environmentabout our environmentabout our environmentabout our environment
Processing and Displaying DataProcessing and Displaying DataProcessing and Displaying DataProcessing and Displaying Data
Thinking Globally: part 2 - 17
• Data fusion
• KML: Keyhole Markup Language
• Google Earth
• Stanford U GIS Lab
• MSU GIS Lab
Topics
Thinking Globally: part 2 - 18
Data fusion
In the geospatial (GIS) domain, data fusion is
often synonymous with data integration. In these
applications, there is often a need to combine
diverse data sets into a unified (fused) data set
which includes all of the data points and time
steps from the input data sets. The fused data set
is different from a simple combined superset in
that the points in the fused data set contain
attributes and metadata which might not have
been included for these points in the original data
set.
Thinking Globally: part 2 - 19
Keyhole Markup
Language
KML is a file format used to display geographic
data in an Earth browser, such as Google Earth,
Google Maps, and Google Maps for mobile. You
can create KML files to pinpoint locations, add
image overlays, and expose rich data in new
ways. KML is an international standard
maintained by the Open Geospatial Consortium,
Inc. (OGC).
https://developers.google.com/kml/
Thinking Globally: part 2 - 20
Google Earth
https://earth.google.com/web/
Thinking Globally: part 2 - 21
Stanford U GIS Lab
lib.stanford.edu/lib.stanford.edu/lib.stanford.edu/lib.stanford.edu/gisgisgisgis////
Thinking Globally: part 2 - 22
MSU GIS Lab
prod.gis.msu.edu/prod.gis.msu.edu/prod.gis.msu.edu/prod.gis.msu.edu/
top related