1. ArcMap: Geoprocessing
RG620
June 02, 2015
How to extract a subset of spatial features from a map using attribute or spatial queries. How to aggregate polygons to a larger polygons and how to append two or more layers into a single layer.

2. Tutorial 8-1: Use Data Queries to Extract Features
Open Tutorial 8-1.mxd
Select by attribute:
Layer: NYBoroughs
Field = “NAME”
“NAME”=‘Manhattan’
Apply and Close
See selected feature and convert it to feature class ‘Manhattan’
Add ‘Manhattan’ to map
New York City Metropolitan area.

3. Make ‘NYBoroughs’ the only selectable layer
Extract ‘Brooklyn’ and make it a feature class
Similarly create ‘Queens’, ‘Bronx’ and ‘Staten Island’ layers
Save map

4. Tutorial 8-2: Clip Features
Use the select by location dialog box
Selection method=Select feature from
Target layer = NYMetroRoads
Source Layer = Manhattan
Special selection method: Target layer(s) features intersect the source layer features
Apply, OK
Examine selected feature and convert to feature class named ‘ManhattanRoads’
OK and click ‘yes’ to add the layer to the map
Turn off NYMetroRoads layer and examine newly created layer

5. Clip Streets Click Geoprocessing, Clip Clip Dialogue Box
Input Feature = NYMetroRoads
Clip Feature = Manhattan
Save output as ClippedManhattanRoads

6. Your Turn!!! Clip the NYMetroRoads layer to the Bronx Borough
Save the output as ClippedBronxRoads

7. Tutorial 8-3: Dissolve Feature
Open Tutorial8-3.mxd
Save map in MyExercise folder
Open attribute table of ‘NY Metro ZIPs’
We have to aggregate ZIP Codes into POs = Post office names
Pos have different boundaries than Boroughs.

8. Dissolve ZIP Codes Geoprocessing, Dissolve Disslove Dialog box
Input Feature = NY Metro ZIPs
Save output as DissolvedNYPOs
Dissolve Field = PO_Namr
Statistics = POP2003
Statistics Type = SUM

9. Tutorial 8-4: Merge Features
To merge 2 or more separate but adjacent layers
Open Tutorial8-4.mxd
Save in MyExercise folder
Merge several feature layers into one feature layer
Click Geoprocessing, Merge
In Input Datasets select all five layers
Save output feature as NewYorkWaters

10. Tutorial 8-5: Intersect Layers
Create new feature class from all the features of 2 inputs
Open Tutorial8-5.mxd
Save in MyExercise folder
Open attribute tables of both layers and examine data
Intersect feature layer
Click Geoprocessing, Intersect
Input Feature = chose both layers
Save output as RoadsWaterIntersection
Output Type = Line OK

11. Tutorial 8-6: Union Layers
Combines geometry and attributes of 2 input polygon layes to generate a new output polygon layer
Open Tutorial8-6.mxd
Save in MyExercise folder
Click Geoprocessing, Union
Select both layers OK
Note: Population data is not apportioned across smaller polygons

12. String several geoprocessing processes
NEXT WE WILL LEARN
ArcGIS ModelBuilder
String several geoprocessing processes
Multiprocess workflows by creating macros