Location: Mirsarai, Chattogram
|Duration of assignment (months): |
|Name of Client: Japan Development Institute (JDI)|
|Contact Person: Dr. Shoichi Kobayashi|
|Start date (month/year): 30th July 2019|
Completion date (month/year): 31st December 2019
|Narrative description of Project: |
NewVision’s appointed engineers/experts assisted JDI with topographic surveying. NVSL staff carry-out RTK based Topographic survey at the site. Based on the information provided by BEZA, the boundary line of the zone area to be confirmed and demarcated. Topographic Map to be prepared using the collected survey data. Alignment and position of buildings, Road, Ponds (major ones), and Structures will be demarcated using the satellite image and ArcGIS mapping. The grid spacing of 10m x 10m was used in the output topographic maps. We also prepared a high-resolution Digital Elevation Model (DEM) using the ArcGIS Spatial Analyst system for the proposed project site including contour line generation at an interval of 5 m. To conduct detail cartographical mapping (on the GIS platform) of surveyed data, elevation models (DEM) with existing land use, water bodies, and so on at a scale of 1:5000 was used.
Scope of Work for Topographic Survey:
The scope of work for the topographic survey of Plot 23 of Mirsharai Economic Zone included:
a) Obtaining relevant survey data and maps;
b) Field Work;
a. Boundary Confirmation;
b. Existing manmade and natural ground features;
c) Map Production;
1. Project planning and survey design;
2. Data and information collection;
3. Data analysis and report writing;
4. Topographic drawing & mapping using Arc-GIS & AutoCAD;
|Description of technical specialization provided by the firm:|
The NVSL and Esolve staff worked in collaboration in different parts of the design work. The coordination and leading position were held by NVSL’s staff where the Esolve experts guide the NVSL staff in different critical issue analysis.
The RTK based topographic team was deployed and fully supervised by the NVSL’s staff and day to day update and data checking was conducted as well. After getting the raw data from the field survey team, they were taken in digital format and clear the vogue data. After the pre-processing and post-processing of the dataset, they were mapped in ArcGIS 10.3 paid version software. Using the data, a moderate resolution Digital Elevation Model was prepared by the NVSL GIS experts and the output were presented in a standard mapping system.