Purpose of Survey¶

1. The survey is conducted for generating a Base Map which is representative of Topography, Infrastructure, Drainage, Buildings etc, with a focus on Water Management in Auroville. Furthermore this survey can be used as base map to build upon more detailed surveys for the various purposes such as Town planning, Land Surveys, Transportation Planning etc.

Use of Layers

1. V-BLDG-SHED (Shed) layer is used when the structure is not entirely enclosed, if At least one side is open (No walls/partition etc). One thumb rule is to answer the question if the building can be locked safely or not. If not, then it is a shed.
2. V-BLDG-HUT (Hut) is used when the building (For human activity/living space) is single storey with roof made up of perishable material such as keet, straw etc.
3. Use of V-BLDG-ROOF (Roof) is for buildings with permanent roofs extending out about more than 1 meter from the outline at ground level. It can also be used for complex roof structures for example Matrimandir Petals.
4. Use of V-BLDG-OTLN (Building outline) is for depicting the outer line of walls of a structure on ground level. This is used when the roof of the building is more or less of the same profile.
5. V-BLDG-RTWL (Retaining Wall) is for walls with the function of retaining either earth/water and the side of the wall should be visible. In case of very thin walls and no side visible, it comes as V-BLDG-RWLL (Retaining wall line). This is depicted as a single line in drawing.
6. Use of V-ROAD-CYCP is for designated cycle path as a single line.
7. Use of V-ROAD-FPAT is for pedestrian paths as a single line. It is used when there is a path of very small width. If the need is to represent a path/road which is unpaved in nature, V-ROAD-UPVD is used, which is polygon type. To represent a path/road of paved nature V-ROAD-PAVD is used, which is also a polygon type.
8. V-WMNG-PIPP for pipe points, V-WMNG-PIPL- for pipe lines.
9. V-BLDG-BMRK is for unidentified bench marks and V-BLDG-MHOL is for unidentified manholes.
10. V-BLDG-PLTF is for impervious surfaces. for example sand and gravel will not come under this layer. cemented paths etc can come.
11. V-WMNG-POOL is for water bodies made for leisure activities- like swimming pool etc.
12. V-WMNG-SUMP is collectively for artificial water retention structures.
13. V-WATR-POND is for top of natural water retention.
14. V-WATR-PONB is for bottom of natural water retention.
15. V-WMNG-DRBA is for bottom of artificial drains.
16. V-WMNG-DRTA is for top of artificial drains.
17. V-WATR-DRBN is for bottom of Natural drains.
18. V-WATR-DRTN is for top of Natural drains.
19. V-WMNG-DRNC is for drain covers.
20. V-WATR-DRAS is for indicating slope of drainage, these are arrows.