Multiple Indicator Cluster Surveys Survey Design Workshop

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Multiple Indicator Cluster SurveysSurvey Design
Workshop

• Using GPS to collect cluster locations

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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

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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

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Examples of what GPS data can bring to MICS
Source DHS studies
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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)

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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

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GPS Collection Teams

• 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

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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

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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

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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.

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3. Assign Cluster Number

• Highlight the Waypoint ID
• Enter in the Cluster Number

Waypoint ID
Coordinate
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4. Complete GPS Form

• Complete the GPS Form
• Highlight OK and click Enter

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GEOGRAPHIC POSITIONING SYSTEM FORM GP GEOGRAPHIC POSITIONING SYSTEM FORM GP GEOGRAPHIC POSITIONING SYSTEM FORM GP
GP1. Cluster number GP1. Cluster number GP1. Cluster number
___ ___ ___ ___ ___ ___ ___ ___ ___
GP2. AreaUrban 1Rural 2 GP2. AreaUrban 1Rural 2 GP3. RegionRegion 1 1Region 2 2Region 3 3Region 4 4
GP4. Operator name and number GP4. Operator name and number GP4. Operator name and number
Name ___ ___ Name ___ ___ Name ___ ___
GP5. Day/Month/Year of measurement 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 Checked estimated accuracy (after ready to navigate) Marked Waypoint Renamed Waypoint to cluster number Recorded Waypoints position Saved Waypoint Checked estimated accuracy (after ready to navigate) Marked Waypoint Renamed Waypoint to cluster number Recorded Waypoints position Saved Waypoint
GP6. Waypoint name GP6. Waypoint name GP6. Waypoint name
___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
N/S/E/W Degrees Decimal degrees N/S/E/W Degrees Decimal degrees
GP7. Latitude N S ___ ___ . ___ ___ ___ ___ ___ N S ___ ___ . ___ ___ ___ ___ ___
GP8. Longitude E W ___ ___ ___ . ___ ___ ___ ___ ___ E W ___ ___ ___ . ___ ___ ___ ___ ___
GP9. Altitude Elevation (Meters) ___ ___ ___ . ___ ___ __ Elevation (Meters) ___ ___ ___ . ___ ___ __

Example of Log Sheet
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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 TrackMaker1, 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

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Common errors in the GPS data

• Duplicate or Paired Points
• Missing Data
• Administrative Mismatches
• Hand-Entry Typos

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With thanks to