1. GIS Lecture: Selection

2. Outline Attribute Selection Feature Location Selection
Proximity Selection

3. Attribute Selection

4. Attribute Query Selection
You have tracts for an entire state, but want tracts for one county only

5. Attribute Query Selection
Select tracts by County FIPS ID
Cook County = 031

6. Export Selected Features
Right-click to export selected features

7. Add Exported Layer
Cook County tracts

8. Feature Location Selection

9. Select by location Powerful function unique to GIS
Identify spatial relationships between layers
Finds features that are within another layer

10. Select by location
Have Cook County census tracts but want City of Chicago only
Can’t use Select By Attributes
No attribute for Chicago
Use “Municipality” layer
City of Chicago is a municipality within Cook County

11. Select by location
Select “Chicago” from municipalities layer

12. Select by location
Selection, select by location

13. Export selected features

14. Proximity Selection

15. Points near polygons
Health officials want to know polluting companies near water features

16. Points near points
School officials want to know what schools are near polluting companies

17. Polygons intersecting lines
Transportation planner wants to know what neighborhoods are affected by construction project on major highway

18. Lines intersecting polygons
Public works official wants to know what streets or sidewalks will be affected by potential floods

19. Polygons completely within polygons
City planners want to know what buildings are completely within a zoning area.

20. Other Location Selections
Completely contain
Are completely within
Share a line segment with
Touch the boundary of
Are identical to
Are crossed by the outline of
Are within

21. Summary Attribute Selection Feature Location Selection
Proximity Selection