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Basic Spatial Queries.

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Presentation on theme: "Basic Spatial Queries."— Presentation transcript:

1 Basic Spatial Queries

2 From Digitizing to Editing
Editing feature shapes The editing process Maintaining spatial relationships Editing feature attributes Creating events from tabular data

3 Editing Feature Shapes
It all starts with a sketch

4 The Editing Process Add your reference data Start EDIT session
Set editing environment Target layer Snapping distance Identify the feature’s sketch Edit your vertices Be sure to save your edits

5 Maintaining Topology Maintaining spatial relationships

6 Editing With Topology

7 Editing Feature Attributes
Attributes Feature Dialog Attribute Table

8 Calculating Attributes
Field Calculator

9 Digitizing Features

10 Points From Tables

11 Basic Spatial Queries

12 Query By Location

13 Query By Attribute

14 Not So Basic Spatial Query
TIMBER STANDS TIMBER STANDS

15 Bool HL HI LL HI HI HI HL LI LL LI HL: HIGH LITERACY LL: LOW LITERACY
HI: HIGH INCOME LI: LOW INCOME

16 Point-in-Polygon

17 Residential, non-flood 27
Commercial - non-flood Commercial - flood Residential - flood Residential - non-flood Commercial Residential Flood zone A B C Surface class Frequency (ha) Commercial, non-flood 77 Commercial, flood 25 Residential, non-flood 27 Residential, flood 120

18 Recode / Reclassify

19 Recode / Reclassify

20

21 Overlay

22 Overlay

23 Overlay

24 Point/Line-Polygon

25

26 Buffer

27 Buffering Lines

28 Buffering Areas

29 The Simple Secret of GIS

30 Buffer Application

31

32 Buffer Application

33 Select-By-Location

34 Select-By-Location

35 Voronoi / Thiessen


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