josé aponte public health advisor module 7: mapping 12 june 2012 epi info™ 7 introductory...
DESCRIPTION
Launching Maps from Enter Enter can geocode addresses into latitude and longitude. A ‘Map’ button on the toolbar will open the maps module with this data already loaded. Internet access is required both to load the maps module and for geocoding.TRANSCRIPT
José ApontePublic Health Advisor
Module 7: Mapping12 June 2012
Epi Info™ 7 Introductory Training
Office of Surveillance, Epidemiology, and Laboratory ServicesEpidemiology and Analysis Program Office
Learning Objectives
After completing this module the participant will be able to:
Understand the fundamental concepts of Epi Map Familiarize with the Epi Map workspace Generate Case Cluster and Choropleth maps Understand some of the geo-referencing concepts Save images of maps
Launching Maps from EnterEnter can geocode addresses into latitude and longitude. A ‘Map’ button on the toolbar will open the maps module with this data already loaded. Internet access is required both to load the maps module and for geocoding.
Launching Maps from the MenuYou can also run the maps module right from the menu, but no data will be pre-loaded. Internet access is required.
Getting started with maps…
“Maps” Navigation Pane
Quick Start Guide Figure 5.2 Click Add
data layer Case Cluster
Click HIV.prjCase
Click “No” external data
Select Latitude & Longitude from the drop downs
Change satellite to Street
Quick Start Guide Figure 5.2 Resulting
map Zoom in to
Atlanta city (where the large dot with 117 cases is)
Use the navigator to do this
Zoom in to ATL
Hover over a dot with multiple cases
Click on a dot to get information about the case
Quick Start Guide Figure 5.3 & 5.4
Quick Start Guide Figure 5.5 & 5.6
More advance options include data filtering, and stratifying.
Adding choropleth layers with cenus info as the theme
Quick Start Guide Figure 5.7
• Set a filter
• Use age < 21
Quick Start Guide Figure 5.8
• Add the case layer again
• This time filter for age > 21
Quick Start Guide Figure 5.9 Resulting
map shows cases stratified by age
Note Map Gadget shows 2 layers
Other Features/Demos of “Maps” Create Time Lapse Save map project (updates as new data is
added) Save map image (paste into reports,
presentations) Right click map to add point marker, zone,
or label Add external Data Layer
Try a choropleth layer so you can demo changing colors Must have at least one geographic variable to link files
Add external Reference Layer (from map server) May use an internal/agency map server May use an external/public domain map server
INSTRUCTOR-LED DEMONSTRATION
Case Cluster Maps
Creating Choropleth Maps
Creating Choropleth Maps EPI Map can also represent data in a map to
interact with files shapefile data fields (.SHP) containing geographical locations.
Shapefiles files may also contain data on populations and other variables, and therefore can provide numerical data that form part of the representation.
Basic Mapping Rules There must be a geographic field in the
dataset that corresponds to a shape file.
Data to be mapped must be aggregated to a unique geographic field.
Data being plotted must be in numeric
format
Shape Files .SHP contains polygon, line, or point
coordinates
.DBF contains names of features and optional info like population, area, alternate code systems, etc., in dBASE format
.shx, .sbn, .sbx files may or may not be included
All 5 (.DBF,.SHP,.SHX,.SBN,.SBX) files must be present, although they are referred to as one “shape file
INSTRUCTOR-LED DEMONSTRATION
Choropleth Maps
For more information please contact Centers for Disease Control and Prevention1600 Clifton Road NE, Atlanta, GA 30333Telephone, 1-800-CDC-INFO (232-4636)/TTY: 1-888-232-6348E-mail: [email protected] Web: www.cdc.gov
Questions?
Office of Surveillance, Epidemiology, and Laboratory ServicesEpidemiology and Analysis Program Office
The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.