You have 1:10,000 scale photo that was scanned as 600 dpi. - PowerPoint PPT Presentation

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You have 1:10,000 scale photo that was scanned as 600 dpi.

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You have 1:10,000 scale photo that was scanned as 600 dpi. ... Change your marker symbology to a cross, and color it a different color for each Quad Name. ... – PowerPoint PPT presentation

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Title: You have 1:10,000 scale photo that was scanned as 600 dpi.


1
  • You have 110,000 scale photo that was scanned
    as 600 dpi.
  • What does each pixel represent in terms of
    meters on the ground?

Scanning density 600 pixels per inch, each
pixel scans 1/600 by 1/600 inch on photo 1/600
0.001667 inch
2
2 ) Circle the figure that represents the
Alaska Albers Conic project as defined using the
following parameters
3
  • You have a color digital camera that produces
    images
  • at 1200 rows by 1200 columns.
  • How many total bytes would store one digital
    photo ?
  • Show your work.

4
4) You have a polygon theme of Alaska National
Parks.
You want to display each Park Name in the legend
table of contents as follows
Circle the Legend Type would you select to
accomplish this
5
From Lab3
  • For each GCP point, fill in the Quad Name as
    Fairbanks D2 ,
  • Fairbanks D3 or Other
  • Change your marker symbology to a cross,
  • and color it a different color for each Quad Name.

6
5) Circle the figure that portrays the
following UTM zone 3, NAD27 coordinate
X 450,000 Y7,200,000
7
You have a point theme Truth.shp and a grid theme
Predict as follows
You convert your point theme to a grid as
follows.

Fill in the output grid Truthgrid
8
7) You have the following table of
radio-collared moose locations.
You want to display these locations as a point
theme. Circle the menu choice that you would
choose to accomplish this
(From Lab3) View-?Add Event Theme and specify
the table name, x field, and y field from your
table.
9
8) You have a text file of UTM coordinates of a
snow machine trail taken using a GPS. You
want to display this trail as a line theme.
Circle the menu choice that you would choose to
accomplish this.
(From Lab1) Step 6) Translate your text file to
an Arcview GIS theme. View--gtAdd Generate Theme
(From Lab6) Create a text file of
longitude/latitude for the corners of your
map Set a pointer or environmental variable
pointing to your generate to shape extension
(generate_shape.avx) Start Arcview, load your
generate to shape extension and use it
10
9) You want to assign a script to a button.
Which of the following properties makes that
assignment? Property
11
10) You want to assign a new button to a view.
What Type and Category would you select to
accomplish this?
12
  • Relief Displacement
  • Increases with distance from center of photo
  • Increases with focal length
  • Increases with decrease in flying height

001 METER/ 0.01 METER HEIGHT/100 METERS HEIGHT
10 METERS
13
Estimating Elevation
Method1 Stereo air photography
(photogrammetry)
14
Method 2 RADAR (Radio Detection and Ranging)
different viewing angles
Dual Antenna Interferometry
Repeat Track Interferometry
15
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16
  • Method 3 LIDAR
  • (Light Detection and Ranging)

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21
  • Method 4 GPS Surveying

22
  • Elevation Points to Elevation Grid

23
  • Interpolate point elevation values to each grid
    cell.

24
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25
Inverse Distance Weighted
  • Closer points have more weight
  • Points inside neighborhood are
    considered..defined by number of neighbors or a
    radius in map units
  • The higher the power, the less the influence of
    farther points
  • Barrier allows you to use a line theme (like
    shoreline) to stop the neighborhood

26
Spline Interpolation
  • Bends a sheet to fit through the points
  • Unlike IDW interpolation, elevation of cells can
    be below or above min/max point elevations

Spline surface
IDW surface
27
  • Contour Lines to Elevation Grid

28
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