Tips on managing GIS data sets
Because of the complex, specialized interrelations among their parts,
manipulate and move GIS data sets only within ArcCatalog (i.e. dont use
Windows Explorer to do so).
All of a GIS data sets components shoul
GIS & Social Research
SYA 6356/SYD 4610
Dr. Richard Tardanico
Dr. Hugh Gladwin
Getting in touch
Office hours: DM 333, Thursdays, 4-5pm
About Spatial Statistics
From Fotheringham et al., Geographically Weighted Regression; Bailey &
Gatrell, Interactive Spatial Data Analysis; & Mitchell, The ESRI Guide to GIS
Analysis, vol. 2.
Aspatial data contain only attribute (i.e. feature) information
Setting Spatial Weights
Sources: Anselin, Spatial data analysis with GIS: An introduction to application in
the social sciences; Terraseer products, spatial weights; Statistical/modeling tools
for design and analysis of conservation monitoring data
References: Ormsby et al., chapter 19; Harvard School of Design, Elements of
Cartographic Style (http:/www.gsd.harvard.edu/geo/manual/style/index.htm
ESRI, The ESRI Guide to GIS Analysis , vol. 1; Brewer, Cartographic Design Using
How to Create a Sequential Unique ID Field in ArcGIS.
The following is easier to do in a statistical software program such as Stata (gen id =
_n) or in Excel (format an id field as text, type 1 in the first cell and 2 in the second
cell, then drag the fil
Hurricane Ivan-Orleans Parish Evacuation Assignment: Create datasets
to analyze in Statistical Programs, GeoDa, & GWR, & to map in ArcMap
Part I: Create Datasets
We will end up with the following data sets to analyze: orleans_esvy,
orleans_nv , and orlean
How to Turn in GIS Assignments
(1) Name each assignment, for example, YourName_Assign11.jpg, YourName_Assign1-2.jpg, YourName_Assign.doc, etc.
(2) Saving maps:
Always store relative path names: File>Map
Properties>Data Source Options>Store relative path
U.S. Census data and ArcGIS: an orientation
The following is taken from Peters and MacDonald, Unlocking the Census with GIS
(ESRI Press, 2004).
No matter what the data source, always check for possible errors (e.g., add
up the Race and gender categories t
Computing Centroids in ArcGIS (see Help: Making Field Calculations)
Whats a centroid?
Centroid: a polygons mean center which is based on the weighted average of
its x and y coordinates; a useful way to summarize the locations of a set of
Assignment 16. GWR 3D Mapping
Sources: ESRI online course on 3D Analyst ; Kennedy, Data in Three Dimensions: A
Guide to ArcGIS 3D Analyst (Thomson/Delmar Learning, 2004).
I: Background for 3D & ArcScene
Surfaces & features: a map layer may contain surface
Assignment 15. Geographically Weighted Regression & 2D Mapping
I: Formatting Data for the Stand-Alone GWR Program
Heres an example using U.S. Census data.
In the GWR stand-alone program, create folders for Data, Output, and
Obtain a census tract s
Assignment 13. Census: Estimating Change
Adapted from Peters and MacDonald, Unlocking the Census with GIS (pages 114-26).
The following example concerns how to estimate 1990-2000 changes in the number
and percentage of renter-occupied housing units of cen
Assignment 11. Census: Downloading and Formatting
Peters and MacDonald, Unlocking the Census with GIS (pages 53-74).
The following illustrates steps involving both geo
Assignment 7. Creating Graphs & Clipping Layers
Review Gorr/Kurland, pages 97-101 and 275-78.
In ArcCatalog, preview : mdtgr2 (table, geography) and examine its metadata
(especially Spatial Reference Information).
In ArcMap, set to store relat
Assignment 6. Reclassification Tables
I. What they are, what they do
Reclassifying data can make things clearer by simplifying the data. It is particularly
helpful with raster data but is useful with vector data, too.
ArcToolBoxs Spatial Analyst Reclass f
Assignment 5. Dissolve, Field Calculations & Creating Graphs; Raster vs.
Review Gorr/Kurland, Tutorial 3 (GIS Outputs) and Tutorial 8 (Spatial Data
Dissolve extracts one or more fields from a larger set of field
Assignment 3. Creating a personal geodatabase
Review Gorr/Kurland, GIS Tutorial 4 Geodatabases.
Feature class: a group of points, lines, or polygons representing geographic
objects of the same kind (e.g., counties, buildings, roads).
ArcGIS Tips January 2007
Always ask, is the data/graphic presentation valid on substantive grounds? Is
it biased in some way or another? If so, why?
Think critically about the substantive validity of data attributes (e.g., raceethnic catego
Exploratory data analysis for GIS
1. Data source/characteristics aspatial considerations :
a. Do the data represent a sample or a population?
i. The appropriateness or interpretation of various
statistical techniques and statistical maps (e.g.,
maps of ge