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Epi Info™ 7 Introductory Training


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Epi Info™ 7 Introductory Training. José Aponte. Public Health Advisor Module 7: Mapping 12 June 2012. Office of Surveillance, Epidemiology, and Laboratory Services. Epidemiology and Analysis Program Office. Learning Objectives. After completing this module the participant will be able to:

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Epi Info™ 7 Introductory Training

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Epi info 7 introductory training

Epi Info™ 7 Introductory Training

José Aponte

Public Health Advisor

Module 7: Mapping

12 June 2012

Office of Surveillance, Epidemiology, and Laboratory Services

Epidemiology and Analysis Program Office


Learning objectives

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 enter

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.


Launching maps from the menu

Launching Maps from the Menu

You 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

Getting started with maps…


Maps navigation pane

“Maps” Navigation Pane


Quick start guide figure 5 2

Quick Start Guide Figure 5.2

  • Click Add data layer Case Cluster

  • Click HIV.prjCase

  • Click “No” external data

  • Select Latitude & Longitude from the drop downs

  • Change satellite to Street


Quick start guide figure 5 21

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


Quick start guide figure 5 3 5 4

Quick Start Guide Figure 5.3 & 5.4

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 5 5 6

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

Quick Start Guide Figure 5.7

  • Set a filter

  • Use age < 21


Quick start guide figure 5 8

Quick Start Guide Figure 5.8

  • Add the case layer again

  • This time filter for age > 21


Quick start guide figure 5 9

Quick Start Guide Figure 5.9

  • Resulting map shows cases stratified by age

  • Note Map Gadget shows 2 layers


Other features demos of maps

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

Instructor-led Demonstration


Creating choropleth maps

Creating Choropleth Maps


Creating choropleth maps1

Creating Choropleth Maps

  • EPI Map can also represent data in a map to interact with files shapefile data fields (.SHP) containing geographical locations.

  • Shapefilesfiles may also contain data on populations and other variables, and therefore can provide numerical data that form part of the representation.


Basic mapping rules

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

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 demonstration1

Choropleth Maps

Instructor-led Demonstration


Questions

Questions?

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.

Office of Surveillance, Epidemiology, and Laboratory Services

Epidemiology and Analysis Program Office