Assignment 7A procedure Log
for zearcaro NR531 Fall 2006
Create
a map of heavy metal and organic matter sample sites in
Data:
nc100cb.shp:
ArcView shapefile of NC counties
hvymtl.shp:
ArcView shapefile of heavy metal & organic matter (toxin) sample sites in
the eastern NC study area.
hydro.shp: ArcView shapefile of hydrologic features
(i.e. lakes, rivers, oceans, sounds, and islands) in NC.
This
data is in NAD 83 StatePlane FIPS 3200 feet.
Data Source:
Ostensible Data Source:
USEPA
Actual Data Source: NR531
website
http://courses.ncsu.edu/nr531/lec/001/Assignments_F06/assignment_07/assign_7_A.exe
Procedure Log:
Using ArcCatalog define the
spatial reference for each shapefile
Target layers: nc100cb.shp,
hvymtl.shp, hydro.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
Join Tables based on
Maj_Hydro field
Target Layers: hvymtl.shp,
hydro.shp
Right
click on hvymtl in contents window
Navigate
to Joins and Relates > Join…
In
the 1 field choose Maj_Hydro
In
the 2 field choose hydro
In
the 3 field choose Maj_Hydro
Click
OK
Result:
Tables joined based on Maj_Hydro field
Change Symbology to show
which water body type toxin sample sites are in.
Target Layer: hvymtl.shp
Double click hvymtl.shp to call up Layer Properties
Click Categories > Unique Values
Set Value Field: hydro.LU_TYPE
Click Add All Values
Change symbols to brighter colors
Arrange layers using Symbol Levels
so that rare sites can be seen
Result: Toxin Sample sites are now
labeled according to land use
Answer
Questions
How
many toxin sample sites are located in rivers?
Selection
> Select By Attributes
Selection
Equation: "hydro.LU_TYPE" = 'River'
Open
Attribute table and read selection count
Answer:
97
How
many toxin sample sites are located in
Selection
> Select By Attributes
Selection
Equation: "hydro.MAJ_HYDRO" = 184
Open
Attribute table and read selection count
Answer:437
Create Layout to display map
Layout view editing
Rename layers and add them to legend
nc100cb.shp
>
hvymtl.shp
> Toxin Sample Sites
hydro.shp
> Hydrological Features
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