Assignment 7B procedure Log
for zearcaro NR531 Fall 2006
Finding
suitable sites for locating antennae along highway corridors in the
Data:
towers.shp (Points)
locations of all the towers in the county
streets.shp (Lines)
streets in the county
sanford.shp (Polygons)
the city limits
leeco.shp. (Polygons)
the county limits
This
data is in NAD 83 StatePlane FIPS 3200 feet.
Data Source:
Ostensible Data Source: The
City of
Actual Data Source: NR531
website http://courses.ncsu.edu/nr531/lec/001/Assignments_F06/assignment_07/assign_7_B.exe
Procedure Log:
Using ArcCatalog
define the spatial reference for each shapefile
Target layers: towers.shp, streets.shp, sanford.shp, and leeco.shp.
For
each layer double click to open shapefile properties.
Click
the Shape row
In
Field Properties select correct coordinate system:
NAD 83 StatePlane
FIPS 3200 feet
Result: Layers now in correct
projection
Open files to an ArcMap diplay, save as mxd file
Erase
towers layer based on city layer
Target Layers: sanford.shp,
towers.shp
Analysis Tools > Overlay >
Erase
Result: New layer created (towers_erase) that contains only the towers inside
Select
roads that towers must be near
Target Layers: streets.shp
Select by Attributes >"NAME"
= 'BOONE TRAIL' OR "NAME" = '
Result: only required roads selected
Create new layer containing
only needed roads
Target Layers: streets.shp
Right click layer > Data > Export Data…
Result: new layer created (main_roads)
Create buffer around
required roads
Target Layers: Export_Output
Analysis Tools > Proximity >
Buffer
Buffer 100 feet, Dissolve: All
Result: new layer created (main_roads_buffer)
Clip towers layer based on main_roads_buffer layer
Target Layers: main_roads_buffer,
towers_erase
Analysis Tools > Extract > Clip
Result: new layer created (towers_erase_clip) that contains only the towers within the
main roads buffer layer
Use Definition Query to
remove towers less than 150 feet
Target Layers: towers_erase_clip
Double click towers_erase_clip
layer in table of contents
In Layer Properties choose Definition Query tab
Use Definition Query of "HEIGHT" >150
Result: only the towers that are above
150 feet now remain in layer
Answer
Questions
How
many towers meet all of the specified criteria?
Target Layers: towers_erase_clip
Count towers on map
Result: 5
Considering
all of the towers, not just those that meet the criteria: How many of the
towers that are located outside the City of
Erase
County layer based on city layer
Target Layers: leeco.shp,
sanford.shp
Analysis Tools > Overlay > Erase
Result: new layer created (leeco_erase) that includes the area of the county outside
the city limits
Clip
towers layer based on leeco_erase layer
Target Layers: leeco_erase,
towers.shp
Analysis Tools > Extract > Clip
Result: new layer created (towers_clip) that contains only towers outside of
Use Definition Query to
remove towers less than 150 feet
Target Layers: towers_clip
Double click towers_clip
layer in table of contents
In Layer Properties choose Definition Query tab
Use Definition Query of "HEIGHT" >150
Result: only the towers that are above
150 feet now remain in layer
Go
to Attribute table to find answer
Target Layers: towers_clip
Result:10
towers are in table
Considering
all of the towers, not just those that meet the criteria: What is the
value in the FID field for the tower that is the furthest distance away from
the street named Jefferson Davis? What is the distance (round to the nearest
whole number)?
Select
Jefferson Davis road
Target Layers: streets.shp
Select by Attributes > "NAME"
= '
Result: only Jefferson Davis road selected
Create new layer containing
only needed road
Target Layers: streets.shp
Right click layer > Data > Export Data…
Result: new layer created (Jefferson_Davis)
Perform
Spatial Join connecting towers layer and Jefferson_Davis
Target Layers: Jefferson_Davis,
towers
Right click towers > Join…
Join data from another layer based
on spatial location
Each point will be given all the
attributes of the point in the layer being joined that is closest to it….
Result: new layer created (join_output)
Go
to Attribute table to find answers
Target Layers: join_output
Open Attribute Table > got to
distance column > sort descending
Read FID number and Distance
Result: FID=10, distance = 28494
Create Layout to display map
Layout view editing
Rename layers and add them to legend
towers_erase_clip >
main_roads > Main Roads
sanford.shp >
leeco.shp.>
Add scale bar
Activate map
Click Insert > Scale Bar
Ensure units are in miles
Choose appropriate bar
Make sure bar display has nice numbers (ie 2000, not 1950)
Result: scale bar now present
Add North Arrow
Activate map
Insert > North Arrow
Choose appropriate arrow
Result: North arrow now present
Add Title
Click new text button
Enter appropriate information
Format to large size by changing symbol to font size 22
Result: Title now present
Add name and date
Click new text button
Enter appropriate information
Result: name and date now present
Add Neatline
Click Insert > Neatline
Select Place inside margins
Result: neatline now present
Add legend
Click Insert > Legend
Set border line at 1.0 point
Set background color to white
Result: legend now present
Format legend
Double click legend to get legend properties dialog open
Click Frame tab
Set both X and Y gap for both border and background to 5
points
Click Legend tab
Result: legend now more visually appealing
Resize all items to reduce
clutter and improve readability
Select items individually, place and resize appropriately
Result: layout now more visually appealing