*Phase II Data Collection
* Phase II Survey Instruments
* Group Discussion Specifics
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Questionnaires and Spatial Forms

Consent Form
        The spatial teams obtained consent from the villagers prior to proceeding with the group discussion.  We promised to inform those who are part of the interview about the content of the questions to be asked; that our goal is to describe social, economic, and environmental change in Nang Rong; that their participation is voluntary and that they can leave any time; that the information they provide is confidential; that we will take their answers and transform them into numbers in a computer file.  This was done before the interview commenced.  A representative from the village, usually the headman, signed the consent form. In some instances, when villagers were unable or were wary of signing the consent form, but consented verbally, the interviewer signed for the villagers.  The interviewer also included the names of the informants on the consent form.  Since the group discussion may have required more than one group meeting, or session, multiple consent forms were used per village.  Each consent form was numbered sequentially to indicate which session the consent form corresponded to.

Household Directory
        A Household Directory was prepared for each village using information provided in Household Questionnaires (Form 6) and the Household Listing.  Household Directories for the target village were used during the Group Discussion process.  Example 5 below indicates the information that was included in the each village’s Household Directory.  The Household Directory served as a listing of all individuals in a village, providing their survey codes, household IDs and the number of plangs used by each individual.  The Household Directory was used in order to complete the Group Discussion process, serving as a checklist and reference for the user names and number of plangs identified for each user by the informants during the Group Discussion Mapping.

Group Discussion Tally
        A Tally Sheet was also prepared for each target village prior to the Group Discussion Mapping.  The Tally Sheet summarized the number of plangs used by each Household, whereas the Household Directory indicated the number of plangs used by individuals.  To prepare the Tally Sheet, interviewers made a list of 3 digit House IDs for the village, which they took from the 9 digit Household IDs (concatenation of 6 digit village ID and 3 digit House ID) in the target village’s Household Directory.  The Head of Household names were written on the tally sheet to the left of the House ID.  Head of Household names were taken directly from the Household Listing.  To the right of each House ID was recorded the total number of plangs used by all individuals in that household.  If any House IDs had 0 plang, this indicated that 0 plang were reported used by that Household in Form 6.  If plangs were identified during the Group Discussion as being used by anyone in these Households, they cannot be matched (no data in Form 6), therefore on the Tally Sheet, the House IDs with 0 plang were struck out (X’d out).  The Tally Sheet was then ready for use during the Group Discussion.

Group Discussion Land Use Form
        This form was used to record data during the Group Discussion process.  The Form was divided into three sections: Section 1 – Cover Sheet; Section 2 – Land Use Form; and Section 3 – Land Use Outside Nine Map Tiles Form.

Section 1: Multiple Cover Sheets were used in most villages because more than one group discussion session (using a different group of key informants) was required to complete the group discussion component for each village.
  • Each cover sheet had an indication for the Group / Session number.
  • In the upper right area of the cover sheet there was an indication for Landmarks completed.  This designation was included on the cover sheet of the first session for each village to indicate that the landmarks had been drawn on the map tiles.
  • Also in the upper right area of each cover sheet a page range was indicated.  This page range corresponded to the pages of the Section 2 Land Use Form that were completed during each group discussion session.  The Section 2 Land Use Form pages were numbered sequentially in the upper right corner as they were completed during each group discussion session.

Section 2: Land Use Form provided the entry rows for the bulk of the land use data.  Typically, a single group discussion session used multiple sheets of Section 2.  If so, the sheets were numbered sequentially in the upper right corners, and this page range was indicated on the corresponding Cover Sheet for the particular group discussion session.

Section 3: Land Use Outside Nine Tiles Form provided space to enter data for land parcels located outside the 9 map tile area (36 square kilometers) and used by the target villagers.  Initially, this included only contiguous areas outside the nine tiles where 5 or more households farmed.  However, the interviewers discovered that many informants could provide specific household names and the number of plangs used by each household for most areas, including areas with less than 5 households farming.  For this reason, Section 3 was updated to its present form.
NOTE: Section 3 was updated after the data collection had commenced.  The information for areas with less than 5 households using the land was gathered for all villages except for the first 5 group discussion villages and a Section 3 was completed for all villages except those first 5.

Click here for more information on the Group Discussion process...

GPS Accuracy Check Form
        During the group discussion, village informants assisted the interviewers in updating and verifying parcel boundaries on the field maps.  The informants also provided user, and in some instances, owner information for both target and adjacent plang.  In order to verify the accuracy of the information provided by the informants, at least six sample plangs, representing at least 6 different households, were randomly selected from the maps.

        Since travel to and from and within the cultivation areas is time-consuming and difficult at times, 2 clusters of 3 plangs, each plang representing a different household (6 households total), were identified from the maps.  Each of these plangs was visited and assessed by a member of the spatial team.

        Plangs were located with the help of a representative from the household (household land guide) that actually farmed the plang.  The actual location and boundaries of each plang were compared to the location and boundaries provided on the map by the informants.  Each plang was also GPS’d and the household land guide verified the user / owner information.

Below are specifics regarding the random selection process and the land verification:

Bottle Cap Draw and Coin Toss Selection:
  1. Maps were selected for the GPS Accuracy Check process by first gathering nine bottle caps, numbered 1-9, which corresponded to the 9-map tiles, and placing them in a hat or bag.
  2. Some map tiles contained no areas used by the village or did not contain at least one cluster of plangs representing 3 different households in the target village.  In these instances, the corresponding cap(s) and map(s) were removed from the process.
  3. The headman or an informant drew a bottle cap and the corresponding map tile was selected based on the draw.
  4. The bottle cap was replaced into the hat.
  5. NOTE: If the map chosen, via the luck of the draw, had only one cluster representing 3 different households, that cluster was chosen immediately and no coin tossing was necessary.
  6. The headman or other informant, standing at a distance of ~1.5 meters, tossed a 1 Baht coin onto the randomly selected map.
  7. A cluster representing at least three households was identified under and around the coin.  If no cluster satisfied the criteria, or if the coin failed to come to rest on the map, the coin was tossed again until a cluster was identified.
  8. 3 – 7 are repeated.  One or two maps, depending on the bottle caps drawn, were chosen and 2 clusters total, each representing at least 3 different households (at least 6 individual plangs), were identified for mobile GPS Accuracy Checking.

Land Use and Location Verification:
  1. For each of the six plangs, a household member was contacted to be the Household Land Guide (HLG). The HLG accompanied the survey team to the their plang.
  2. The spatial team then traveled to each of the six plangs and a GPS position was gathered in as close to the center of the plang as possible.  This likely involved navigating bund lines to reach the plang center to avoid entering the water in flooded areas.
  3. The HLG was used to navigate to the actual location of their plang and to identify the household member(s) that used the plang.
  4. The GPS position and the map were used together to determine if the plangs had been mapped correctly in the group discussion.
  5. Team members completed the GPS Accuracy Check Form for each of the plang visited.  Example 8 below indicates the information that was gathered for each plang.
  6. Teams were instructed to check yes if the parcel was assessed and verified as accurate.  If the parcel was unable to be assessed, or if boundary and use data from the group discussion differed substantially from that observed in the cultivation areas, teams were instructed to provide detailed notes as to the nature of the problem.  As it turns out, if errors in boundary and use data were identified, the team members corrected the problems and indicated that the parcel was assessed.  No detailed notes related to the problems were recorded.

        A CBIRD driver and truck were hired to transport a geodetic control survey GPS team around Nang Rong district to collect geodetic control.  The driver was paid 100 baht/day during the week and 250/day during the weekends, and he was available from 8:30 – 5:00 each day.

        Three types of maps were used to complete the Geodetic Control GPS.  The primary type was air photo image maps, prepared for all air photos covering Nang Rong district.  The second type of map was an air photo index map, indicating the location of air photo center points, the extent of each air photo’s coverage, air photo ID#s and dates.  This information was overlaid on a Nang Rong map showing roads, hydrography, and study villages and their 3 km buffers.  The third type of map was 1:50,000 topographic maps of the district with detailed roads and hydrography, village locations, mainly used for navigation purposes.

        Air photo image maps were basically larger versions of the original scanned 1:50,000 air photos.  Two lines were drawn on the air photo image maps, which intersected at the air photo center point (principal point) and divided each air photo into 4 quadrants.  In order to properly rectify the air photos, at least 1 GPS point was gathered in each quadrant at a location that is visible on the air photo, typically prominent road intersections near the center to outer edges of the quadrants (see Figure 1).

        Prior to driving in the field, candidate GCP locations were marked on the air photo image maps.  The GCP collection team navigated to these locations in a truck and then on foot.  Upon arrival at each GCP location, a GPS point was collected for a minimum of 3 minutes (180 positions) and the Geodetic Control GPS Form was completed for that particular GPS File/location.

  Last Modified: 07/14/2004 UNC Carolina Population Center