Apt Technology for Mapping of Urban Areas
All over the world, remote method of survey such as aerial photography, satellite images are adopted to prepare location specific topographical maps of urban areas. Satellite images would provide 2D maps which are effectively used in preparation of thematic maps while Aerial photographs facilitates mapping in 3D, generation of contours and spot heights. The maps are even prepared with the Total station survey which is very costly and time consuming and not many experts are available in urban area survey using Total station. The Department has, in association with the Department of Municipal Administration (DMA) and the Karnataka Urban Infrastructure Development and Finance Corporation (KUIDFC), carried out a study to determine the apt technology for mapping of urban areas to meet the needs of all the user departments/organisations, including creation of titles to properties. It has been concluded from the study that no single source of survey data can give all the details in short time at economical cost.
In view of these conclusions, the preparation of base maps with 3 different technologies has been taken up by the departments for 42 towns under Karnataka Municipal Reforms Project (KMRP) through KUIDFC from this Department with World Bank aid. The project are out sourced as per World Bank norms though UMC.
1. Establishment of net-work of primary survey control points (PSCPs).2. Survey and mapping of 5 towns in BMR
1. Establishment of net-work of primary survey control points (PSCPs).
The department has taken up establishment of Primary Survey Control Points (PSCP’s) for all the urban areas in the state in Phase wise under the KUDCEMP and KMRP project. This is intended that all Government departments and organisations which wish to carry out survey for any project in and around the urban areas, where PSCPs are established, can refer to such PSCPs in their survey so that the town maps can be updated with new developments seamlessly. The departments and organisations of the State and Union may approach the DTCP and obtain the control data.
The Construction of pre-cast concrete monuments for the PSCP’s with specified metallic marker with the unique numbering system was implemented by the Department. The design for the marker and the concrete monument are in Fig SC-1 and SC-2 respectively. Establishment of horizontal control (x and y) using global positioning system (GPS) technology and height (z) by spirit levelling with reference to the Survey of India Bench Marks was carried out through The Karnataka Geo-spatial Data Centre, Survey of India, Bangalore, from 2005 to 2006 under the KUDCEM project.
List of established PSCPs
Network of 854 PSCPs on permanent basis have been established at 21 places in 12 districts under KUDCEMP. The list of 21 places and the number of SCPs are in given in Table -SC1.
2. Survey and mapping of 5 towns in Bangalore Metropolitan Area (BMR)
The Department has carried out total station survey for 5 towns - Anekal, Hoskote, Kanakapura, Magadi and Nelamangala - in the Bangalore Metropolitan Area (BMR) through outsourcing as per the request from the Bangalore Metropolitan Region Development Authority (BMRDA) and prepared the maps. The work involved establishing net-work of PSCPs using GPS technology and secondary survey control points (SSCPs) using Total Station traverse.
The maps were prepared at basic scale 1:500 including measurements of all buildings and well defined property boundaries toone cm accuracy which is required in creating property records to establish titles. Maps were derived at scale 1:1,000 with selective editing. Refer Table –B2 for details. Field work was commenced in July, 2006 and completed in January, 20007 and final maps in colour and in black and white on polyester film were prepared during July, 2007.
1. Mapping of Tumkur city, about 140 sq km, by photogrammetry through KGDC, Survey of India using the aerial photographs at 1:8,000 taken under the KUDCEMP. Maps at basic scale 1:2,000 are in the final stage of delivery.
2. Mapping of Karwar city, about 120 sq km, by photogrammetry through Karnataka State Remote Sensing Applications Centre (KSRSAC), using the aerial photographs at 1:8,000 taken under the KUDCEMP. The mapping was taken up as a pilot project under KMRP. Maps at basic scale 1:2,000 are in the final stage of delivery.
3. Mapping of Hassan city, about 120 sq km, in 2D at scale 1:5,000 using 0.61 m resolution Quick Bird satellite images through KSRSAC. Maps are at the final stage of completion.
1. Photographs for fourteen places, vide Table P1 procured at scale 1:8,000 during the year 2004 (13) and 2005 (3) under KUDCEMP by this department are poised to be mapped by photogrammetry at basic sale 1:2,000 by the National Remote Sensing Centre (NRSC), Hyderabad. The total area to be mapped is about 1,750 sq km. The procurement of the services of the NRSC under the KMRP is in advance stage.
2. Photographs for three places vide Table P2 - Dod Ballapur, Devanahalli, Vijayapura - procured at scale 1:6,000 during the year 2008 as part of the flying for 2,900 sq km for Utility Mapping of Bangalore by NIC. The 3 places are also included for mapping in 3D at basic sale 1:1,000 by the NRSC. The total area to be mapped is about 250 sq km. The procurement of the services of the NRSC under the KMRP is in advance stage.
Creation of property titles to all urban properties is high on the reform driven Jawaharlal Nehru National Urban Renewal Mission (JNNURM) agenda. Detailed and accurate maps at 1:500 with measurements of properties of boundaries and buildings to a cm accuracy are essential for creation of property records for title certification. For this purpose, survey of Hassan using Total Station and preparation of maps at basic scale 1:500 and derived at 1:1,000 has been taken up under the KMRP. Total estimated area to be surveyed is about 100 sq km in which 25 sq km is developed and 75 sq km is undeveloped. The Expression of Interest were invited through the News papers with the last date being 28th of January, 2010. In reply the UMC has received Twenty one (21) EoIs and are evaluated and the approval for issuing RFP to elligible consultants is awaited.
Mapping of 31 towns using Satelite Images under KMRP in 4 phases is under progress.
4a. In the Firtst phase for 11 towns E.O.I has been invited and evaluted and the approval for issuing RFP to elligible consultants is awaited.
4b. In the Second phase, mapping for 5 towns, E.O.I has been invited through paper advertisement and the last date for submission of E.O.I. is on 07-08-2010.