Once all the relevant data are plotted on the 3D map, field verification and community  validation  may  be  conducted.  This  step  is  primarily  to  verify the precision or correctness of the data plotted on the 3D map and seek the validation of the larger community. These give the participants a sort of confidence that the data they have generated is correct and verified.

10.1 Field verification

The following steps are suggested in conducting the field verification:

  1. Identify the data on the 3D map that needs to be verified (e.g. extent of low-risk, medium-risk and high-risk areas, location of houses, number of vulnerable people in a particular house).
  2. Identify the locations or zones for the data that needs to be verified (e.g. hamlets or quarters of the village, rivers, mountains).
  3. Take  photographs  of  these  areas  and  either  store  the  pictures  on  the camera or print them out if printer is available
  4. Divide  the  participants  into  small  groups  according  to  the  number  of locations  or  zones  identified  in  step  2  and  attribute  to  each  group  a camera  with  the  photographs  or  a  printed  copy  of  the  area  they  will cover for the field verification. For instance, if there are five places to be visited for field verification and there are 20 participants, then there should be five groups each composed of four participants.
  5. Suggest different tasks to each member of the group:

o   Data collectors – to document the results of field verification using  -cameras,  pen  and  paper  and  other  means  of  documentation  – including GPS if relevant

o   Guide  –  to  guide  the  group  on  its  way  during  the  entire  field  -verification

o   Time  keeper  –  to  keep  the  group  updated  of  the  agreed  time  to  -finish the field verification

  1. Conduct  the  field  verification.  Each  group  reports  on  a  note  book  or on their printed photograph of the map the discrepancy they observe between the 3D map and the reality of the ground (Figure 50).

At the end of the field verifications, the corrections should immediately be done on the 3D map. In most cases, not all participants need to participate in the field verifications especially if there are only few data to be verified. Other participants can then proceed to other necessary activities retouching of paints, verification of household database, cleaning up of the training area, preparation of the 3D map elements such as scale, title etc. The purpose is to maximize the time of the participants (see step 13).

Figure 50: Field verification conducted using printed map and digital cameras in Mondulkiri, Cambodia  (JC Gaillard, January 2011)

Figure 50: Field verification conducted using printed map and digital cameras in Mondulkiri, Cambodia (JC Gaillard, January 2011)

10.2 Community validation

Community validation is usually conducted after the P3DM training during a community assembly or larger event which involves the larger community. The purpose of a community validation is to seek the approval of people who have not participated in the construction of the 3D map but who are concerned by both the map and the DRR action plan. This is also a chance for the other members of the community to verify the accuracy and location of the symbols that concern them (e.g. location of house and neighbors).


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