Gis in water resources concepts from midterm 2012
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GIS in Water Resources Concepts from Midterm 2012 PowerPoint PPT Presentation


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GIS in Water Resources Concepts from Midterm 2012. David Maidment. Definition of Latitude, f. m. p. S. n. O. f. q. r. (1) Take a point S on the surface of the ellipsoid and define there the tangent plane , mn (2) Define the line pq through S and normal to the tangent plane

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GIS in Water Resources Concepts from Midterm 2012

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GIS in Water ResourcesConcepts from Midterm 2012

David Maidment


Definition of Latitude, f

m

p

S

n

O

f

q

r

(1) Take a point S on the surface of the ellipsoid and define there the tangent plane, mn

(2) Define the line pq through S and normal to the

tangent plane

(3) Angle pqr which this line makes with the equatorial

plane is the latitude f, of point S


Geodatabase – a store for all types of geospatial information


Workspace

Geodatabase

Feature Dataset

Feature Class

Geometric

Network

Relationship

Object Class

ArcGIS Geodatabase


Subwatershed Precipitation by Thiessen Polygons

  • Thiessen Polygons

  • Intersect with Subwatersheds

  • Evaluate A*P Product

  • Summarize by subwatershed


a

b

c

d

e

f

g

h

i

ArcGIS “Slope” tool


ArcGIS Aspect – the steepest downslope direction


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