Gis presentation


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Gis presentation

  1. 1. Topographic Survey and GIS Mapping for Cyclone Resistant and Flood Adopted Affordable Housing Design
  2. 2. Topographic survey refers to measuring the surface of the earth, in particular the study area, with standard known coordinates (0-0 origin for x and y coordinates) for Northing and Easting, and vertical (Z) coordinate, where Mean Sea Level in m PWD is considered as 0 m PWD. This survey covers land levels/ spot levels for contours at 0.3 m intervals with denser intervals for undulations, structures in the survey area including buildings, industries, lakes, rivers, canals, roads etc. have surveyed and located in map in predefined co-ordinate system and parameters. Background
  3. 3. <ul><li>To know the existing topographic and physical conditions, land use, </li></ul><ul><li>transportation situation of the project area. </li></ul><ul><li>To identify the effect the flood flow, sub flood flow zone, low laying , </li></ul><ul><li>water logging and other natural hazardous area; </li></ul>Objectives of the Survey
  4. 4. TS Survey Techniques: <ul><li>Distance measurement </li></ul><ul><li>3-dimensional co-ordinate measurement (x, y, z) </li></ul><ul><li>Traverse-style co-ordinate measurement </li></ul><ul><li>Re-section </li></ul><ul><li>Offset measurement </li></ul><ul><li>Missing line measurement </li></ul><ul><li>Remote elevation measurement </li></ul>
  5. 5. Site location of the Proposed Cyclone Resistance House Site location at Local Context Atulia Union Parishad
  6. 6. Site location in Regional Context Active NGOs in Baraikhali BRAC, Care, ATN, Red Crescent Society Active NGOs in Jiudhara RRF supported by UNDP Bay of Bengal Sundarban Bagerhat District
  7. 7. Site location in Regional Context Site location of the Proposed Cyclone Resistance House Bay of Bengal Active NGOs in Atulia Muslim Aid, PAB Active NGOs in Gabura Oxfam (GB), Bangladesh Active NGOs in Padma Pukur Shushilon, Cocern Worldwide Active NGOs in Burigoalini CCDB, Islamic Relief, Caritas Sundarban Satkhira District
  8. 8. PAB Cyclone Resistant House Total Area = 0.48 Acre
  9. 10. The project location is very close to Sunderban and Bea of Bengal. Lots of Rivers are surrounding there. Due to climate change, two devastating cyclones with tidal surges Sidr and Aila occurred consecutively. During cyclone, tidal surges inundated vast area and the embankment system makes the area as a polder which obstructs water drainage. So for any types of infrastructural development (Especially housing), height of the basement could be an important considering aspect. We discussed with local people regarding the basement height of housing reconstruction considering last cyclone Aila, they commented and from different sources found that the LGED road was inundated about 0.304 to 0.381 meter . So our recommendation is building basement would be at least 0.457 to 0.50 meter high from the existing road level. Conclusion and Recommendation
  10. 11. Thank You