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MICS4 Survey Design Workshop Multiple Indicator Cluster Surveys Survey Design Workshop Using GPS to collect cluster locations.

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Presentation on theme: "MICS4 Survey Design Workshop Multiple Indicator Cluster Surveys Survey Design Workshop Using GPS to collect cluster locations."— Presentation transcript:

1 MICS4 Survey Design Workshop Multiple Indicator Cluster Surveys Survey Design Workshop Using GPS to collect cluster locations

2 MICS4 Survey Design Workshop What is GPS GPS is a satellite-based navigation system A GPS unit determines its position using satellites that orbit the earth. Each satellites position, as well as the current time, is transmitted via radio signals. The GPS unit receives these signals and uses them to calculate its position in terms of latitude, longitude, and altitude There is a variety of GPS brands and models Recommended model for use in MICS surveys is GARMIN ETREX GPS

3 MICS4 Survey Design Workshop Why use GPS to collect cluster locations Permits linking of additional data to MICS data through geographic links –E.g. Census data, facility data, other geo-located data Permits geographic grouping of data beyond region –E.g. Climactic zones, agricultural zones, etc. Permits mapping of sample clusters –E.g. with DevInfo

4 Examples of what GPS data can bring to MICS Source: DHS studies MICS4 Survey Design Workshop

5 Decision Process for GPS Data Collection Method Using pre-existing GPS data –Ex. using Geo-referenced Census –GPS coordinates can be acquired before the survey or listing (after EA selection) Collection of GPS during listing –If not talk to the survey manager to discuss possible options (strong recommendation to collect GPS data during listing activities)

6 MICS4 Survey Design Workshop GPS Collection Process 1.The GPS collection teams collect one waypoint (location) for each assigned cluster 2.The waypoints are captured as close to the geographic center of the cluster as possible 3.Saved information are waypoint name (cluster number), latitude, longitude, and altitude to the GPS unit 4.These information should also be written down on GPS form that will serve as a paper back-up if any digital data in the GPS unit is lost or corrupted

7 MICS4 Survey Design Workshop GPS Collection Teams 1.GPS data collection may be incorporated into different phases of survey: If the GPS units are used to update the sample frame, then listing teams are responsible for collecting the GPS data GPS data collection may also take place during interviews, in which case one person on a team may be responsible for collecting the GPS waypoints

8 MICS4 Survey Design Workshop How to use GPS 1.Finding a Good Location to Collect a GPS Waypoint 2.Activate GPS 3.Identify and mark location (waypoint) 4.Record location on form

9 MICS4 Survey Design Workshop 1. Finding a Good Location to Collect a GPS Waypoint Find a place with a clear unobstructed view of the sky –First Choice: Geographic center of the populated settlement area of the cluster –Second Choice: Open area near the center, or on top of a building in the center

10 MICS4 Survey Design Workshop 2. Activate Garmin Turn on the Garmin. Once it has locked into enough satellites then press the Page button until you reach the MENU screen and select MARK.

11 MICS4 Survey Design Workshop 3. Assign Cluster Number Highlight the Waypoint ID Enter in the Cluster Number Coordinate Waypoint ID

12 MICS4 Survey Design Workshop 4. Complete GPS Form Complete the GPS Form Highlight OK and click Enter

13 MICS4 Survey Design Workshop Example of Log Sheet GEOGRAPHIC POSITIONING SYSTEM FORMGP GP1. Cluster number: ___ ___ ___ GP2. Area: Urban1 Rural2 GP3. Region: Region 11 Region 22 Region 33 Region 44 GP4. Operator name and number: Name ___ ___ GP5. Day/Month/Year of measurement:___ ___ / ___ ___ / ___ ___ ___ ___ Checked estimated accuracy (after ready to navigate) Marked Waypoint Renamed Waypoint to cluster number Recorded Waypoints position Saved Waypoint GP6. Waypoint name: ___ ___ ___ N/S/E/WDegreesDecimal degrees GP7. Latitude:N S___ ___. ___ ___ ___ ___ ___ GP8. Longitude:E W___ ___ ___. ___ ___ ___ ___ ___ GP9. Altitude:Elevation (Meters)___ ___ ___. ___ ___ __

14 MICS4 Survey Design Workshop Post Field GPS data checking and cleaning When GPS data return from field work, the GPS Data Collection Coordinator checks that the GPS data are correct S/he uses GPS TrackMaker 1, a free geographic information system, to plot the GPS points and check for common errors The GPS TrackMaker® program for Windows® 98SE/2000/ME/XP/Vista allows bi-directional datacommunications between GPS receivers and your computer, including full data editing and storage options

15 MICS4 Survey Design Workshop Common errors in the GPS data Duplicate or Paired Points Missing Data Administrative Mismatches Hand-Entry Typos

16 MICS4 Survey Design Workshop With thanks to


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