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Web GIS

Web GIS. By KAVAL KUMAR DASANLA FACULTY ESCI,Hyderabad. GIS - Geographic Information Systems. “ a computer system designed to allow users to collect, manage and analyze large volumes of spatially referenced information and associated attribute data”.

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Web GIS

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  1. Web GIS By KAVAL KUMAR DASANLA FACULTY ESCI,Hyderabad

  2. GIS - Geographic Information Systems • “a computer system designed to allow users to collect, manage and analyze large volumes of spatially referenced information and associated attribute data”. • “a computer based system used to input, store, retrieve, and analyze geographic data sets. The GIS is usually composed of map-like spatial representations called layers which contain information on a number of attributes such as elevation, land ownership and use, crop yield and soil nutrient levels” • “A computerized system that provides advanced capabilities for the processing and interpretation of spatial information from the real world” • “GIS is a "smart map" tool that allow users to create interactive queries (user created searches), analyze the spatial information, and edit data” • INTEGRATION OF SPATIAL DATA & NON SPATIAL DATA

  3. Major Stages of GIS • Raster to Vector conversion • Topology Build • Editing • Geo-reference • Projection • Thematic mapping • Data Integration • Customisation • Users -Implementation

  4. APPLICATIONS Application areas Decision support & Admin • Natural resource management • Agriculture • Landuse planning • Rural Development • Urban planning • Disaster Management • Forestry • Geology- Morphology, Groundwater • Watershed management ….. Policing Municipal Utility sector Health Education Irrigation Land Records Development programs Transport Tourism Archeology Crop Insurance Housing …..

  5. The Project is dealt in FOUR PHASES: Phase 1: Base map preparation. Phase 2: Property survey and utility mapping Phase 3: GIS application development. Phase 4: Web enabled GIS development PROJECT DETAILS

  6. Review of existing system Collection of data available with Municipality, PHED etc. Procurement of high resolution Satellite data Geo-coding and Geo referencing of Satellite Imagery Base Map Preparation showing all Physical Features Generation of contour overlay at 1 m/0.5m interval Inc locality, ward, mun boundaries Field Verification Preparation of 1:1000 Maps for METHODOLOGY - I

  7. REQUIREMENTS High Resoultion satellite data with Physical Features and 1m/0.5m interval contour information Updated Maps and Records of Properties Infrastructure to develop a Customized GIS Package PREPARATION OF UPDATED BASE MAP

  8. SCOPE OF THE ASSIGNMENT TO ACCOMPLISH • Large scale base map covering entire municipal • limit. • GPS ground control survey for geo-coding & geo- • referencing. • 1m Contour maps for upland towns and 0.5m • contour interval for coastal towns. • Above data sets in softcopy format for easy • integration with block boundaries, ward • boundaries, etc.

  9. SCOPE OF THE ASSIGNMENT …..CONTD…. • Updated base maps. • Property information captured : plot area, plinth area, • property assessment numbers, land use, etc.. • Utilities mapped: water supply, under ground drains, • street lighting, roads, etc.. • Application of GIS software • H.R.D. Capacity Enhancement - awareness of GIS by • municipal staff

  10. BASEMAP STATUS WITH THE ULBS

  11. SAMPLE OUTCOME Property usage map

  12. FEATURES CAPTURED IN BASE MAP  Road network of all types of roads with associated details.  Rivers and drainage systems including all water bodies.  Railways with associated details.  All built up structures such as human settlements, industries, educational, recreational, religious etc.  Utility services such as water supply, sewerage system, power distribution etc.

  13. FEATURES CAPTURED IN BASE MAP…….contd…. Cadastral boundaries  Contour at one meter / 0.5 meter interval.  Green cover  Others - based on local conditions • The base maps are prepared on various • layers for ease of operation in GIS.

  14. IKONOS DATA OF PART OF MACHILIPATNAM

  15. FEATURE EXTRACTION FROM IKONOS IMAGE

  16. VECTORISED LAYER OF PART OF MACHILIPATNAM

  17. IKONOS DATA OF PART OF MACHILIPATNAM Municipal Office

  18. BASE MAP BEFORE FIELD SURVEY

  19. APPROACH AND METHODOLOGY

  20. Review of existing system Collection of data available with Municipality, PHED etc. Procurement of high resolution Satellite data Geo-coding and Geo referencing of Satellite Imagery Base Map Preparation showing all Physical Features Generation of contour overlay at 1 m/0.5m interval Inc locality, ward, mun boundaries Field Verification Preparation of 1:1000 Maps for METHODOLOGY - II

  21. DETAILS OF PROPERTY AND UTILITY MAPPING AND DEVELOPMENT OF GIS  The details of properties assessment number (house number wise)  Plot and building boundaries measured.  Building height approximated to the nearest meter with number of floors  Usage of building with trade specification if any  Type of structure DETAILS OF PROPERTY AND UTILITY MAPPING AND DEVELOPMENT OF GIS The tasks covered

  22. PROPERTY AND UTILITY MAPPING & DEVELOPEMNT OF GIS ………contd……..  Water Supply details:  Details of intake works including pump station (if any)  Raw water mains  Treatment plant(s)  Built distribution, transmission  Reservoir tanks including balancing tanks and bor In relation to the above material, age and capacity are collected. Information on the distribution system :  The diameter, age, material and condition of pipe  The location of valves and bulk meters  House service connections, public stand posts inter- connections and valves on each line and separately  Transmission mains including pressure mains

  23. PROPERTY AND UTILITY MAPPING & DEVELOPEMNT OF GIS ………contd…….. • Underground Drainage •  Trunk sewers, main sewers and sub main sewers •  The location of manholes, center to center distance from upstreams manholes and from downstream manholes, house service connections •  The diameter, age, material and conditions of pipe • Surface Drains •  The main town level drains with final disposal points •  The intermediately drains and all other drains •  Cross section of all drains with clear width and depth (levels)

  24. PROPERTY AND UTILITY MAPPING & DEVELOPEMNT OF GIS ………contd…….. • Street Lighting •  Street lighting network system with information about transformers, electric poles, high mast lighting, status of working condition etc. • Roads •  Road network system with clear hierarchy •  Information relating to right of way, carriage way, width of footpath •  Information relating to type, condition

  25. PROPERTY AND UTILITY MAPPING & DEVELOPEMNT OF GIS ………contd…….. Data on property and utilities network: 1. Actual measurement of locations and assets in the field. 2. Abstraction of details from 'as built' drawings. 3. Information from adhoc sources such as field books in local offices and knowledge from long serving employees.

  26. PROPERTY AND UTILITY SURVEY

  27. PROPERTY & UTILITY SURVEY MANUALLY UPDATED FIELD BASE MAP

  28. PROPERTY & UTILITY SURVEY BASE MAP BEFORE FIELD SURVEY DIGITALLY UPDATED BASE MAP

  29. CUSTOMISED GIS APPLICATIONS

  30. DATA COLLECTION PROFORMA

  31. BEFORE PHYSICAL SURVEY AFTER PHYSICAL SURVEY Base Map v/s Updated field map

  32. Door numbering system • We propose to conduct detailed study on the existing door numbering system in GHMC area provision of door numbers for vacant sites and a new simplified & rationale numbering system will be developed in consultation with GHMC • Rust free steel number plates to the buildings with the given specifications of 10’ X 5’ MS pre coated 1mm thickness plate with letters in white and blue background colour. • The vacant sites will also be given continuous number.

  33. Existing System of House Numbering • The present House Numbering System consists of Ward - Block - House • number and the same is being followed since long. • The house numbers are not in a continuous series. When a new house comes • into existence in between the existing numbers, sub nos. and bye-numbers • are given without any order, causing further confusion • Entire GHMC will be divided into different blocks. Block boundaries will be • drawn in such a way that the boundary is clearly identifiable on ground with • reference to land marks. • In the new system the entire city will be delineated into Localities and Main • roads. The premises are numbered in the Localities and Main Roads • separately in a continuous series. • 5-digit Locality Code Number is proposed to be given for all the localities, • where, first two digits represent Ward Number and the last three digits • represent the Locality Number. Similarly all the Main roads are also given • unique Code numbers for identification

  34. Delineation of Localities • Localities are proposed to be delineated in each ward, with the following parameters • The locality is viable in terms of area and population and has distinct boundaries. • The name of the area is prominent with reference to name of colony, Revenue Village, Post Office, GHMC Council ward etc. • The Area is to delineated with reference to ward boundary, Broad Network of roads, Physical Boundaries like Watercourses, Drains, and Railway Lines etc. • While delineating the areas smaller localities, colonies, slums that are locally known with reference to prominent locality name are included and comprehensive area is delineated.

  35. APPLICATION DEVELOPMENT • Assignment of House Numbers • Each premises built-up / open will be assigned with one number. • Each Apartment / Commercial Complex will be assigned, with one general • number. • Each Flat / Shop / Unit will be assigned with by-numbers. • Slums which are prone for changes will be assigned two or block wise • numbers easy location the houses. • Normally the numbering in a locality would start from the corner nearer to • the city centre. • The street that nearer to the city centre will be numbered as street number 1. • Similarly numbering on main roads will be done from one end of the road to • the other end and continue the series on the other side till the starting end. • A locality may abut main road / roads where there will be separate series of • numbers. • Detailed locality plans will be prepared for all localities, main roads showing the locality boundaries, streets, lanes, premises with old and new numbers. • House / Premises numbers displayed and street boards are fixed.

  36. Showing the selected road attributes

  37. Sample web pages showing the Road Attributes

  38. Sample web pages showing the gRIS

  39. Proposed Scope –Application Development

  40. Application Development-Module Customization

  41. ApplicationDevelopment - Module Customization

  42. No. of properties mapped and data collected through survey formats shall be same. No property shall be left without integration of non-spatial data. All polygon themes shall have feature area in attribute tables. All polygon themes should not have any silver polygons. All maps should be demarcated with specified symbols and colors in the soft copy. APPRAISAL REPORT ON COMPREHENSIVE SURVEY PLAN

  43. The ward wise road network type and condition of all layers . Road widths, schedules, landmarks. The hatch pattern for roads type and color for condition in all wards. Major landmarks in all wards. CHECKLIST FOR ROAD

  44. Ward wise drainage network. The ward wise type and condition. Flow direction in all wards. Schedules landmarks drain condition and type Culverts in blocks. CHECKLIST FOR SURFACE DRAINS

  45. Ward wise water supple network in layers (type and condition). Flow direction in all wards. Reservoirs and water sources in blocks. Valves, pump sets, power bores, landmarks, legend in all wards CHECKLIST FOR WATER SUPPLY

  46. Ward wise street lighting maps --in types and condition of layers. Garbage bins, dust bins -- type and condition Street lights type and condition in all wards. CHECKLIST FOR STREETLIGHTING AND SOLIDWASTE MANAGEMENT

  47. Shape files and Arc map document (.mxd) ward wise and sector wise to be submitted. Fair maps data with specified colors and symbols to be submitted in A1/A0 size. OUT PUT OF GIS

  48. User needs assessment and requirements specifications. Project Planning. Database designing. Verification/editing of data. Database development. Application Coding. Web-enabled GIS Applications

  49. Database used: SQL server 2000, Arc SDE 9.1 Platform: NET Front-End: ASP, ASP. net, C#. Back-end: SQL Server2000, Arc SDE 9.1 Web server: IIS 6.0 Application Server/Spatial Server: Arc IMS 9.1 TECHNICAL DETAILS

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