GIS AND REMOTE SENSING FOR OPEN SPACE PROTECTION ENVIRONMENTAL MANAGEMENT DEPARTMENT

Transcription

1 GIS AND REMOTE SENSING FOR OPEN SPACE PROTECTION ENVIRONMENTAL MANAGEMENT DEPARTMENT 22 nd May

2 Introduction It is said that more than 80% of the City s activities throughout the world are spatially related. GEOGRAPHIC Conservation is about places - Andy Rowan, Ph.D. Almost everything that happens, happens somewhere. Paul A. Longley INFORMATION SYSTEM The new source of power is not money in the hands of a few but information in the hands of many. John Naisbitt, Megatrends A decision is a good as the Information that goes into it. John F. Boorout, Jr. 2

3 Contents to be covered in the presentation Decision Define problem Output GIS Process Define GIS criteria GIS Analysis Data Management And Verification Build OS Database 3

4 Define GIS Problem Developmental challenges: Pressure for development/ alienation of open spaces/ rapid loss of open space Development pressure specifically on the retention, conservation and expansion of the open space network Invasion of open spaces Inherited fragmented open space system Redress and equitable provisioning of open space Pollution and dumping Hazardous land uses e.g. sewage, mine dumps, slimes dams 4 Quality of open spaces

5 Define GIS Problem Information: Accuracy of database Level of detail of database Access to database Decision-making: Integration between decision-making in different departments Consistent decision making based on accepted criteria 5

6 Define GIS Problem (JMOSS Process) JMOSS I OS Policy OS Categories Capturing of OS Sourcing of OS datasets JMOSS II Management Strategy OS Verification (Groundtruthing) 6 Capturing of Brown OS Network OS Verification (Groundtruthing) OS Provision (Analysis) OS Integration with RSDF s OS MANAGEMENT FRAMEWORK Status Quo Policy Framework Regional OS Framework

7 OS Categories PRIMARY OPEN SPACES MAIN CATEGORY Ecological open space Existing Desired Nature reserves Botanical gardens SUB-CATEGORIES Waterbodies (buffered by 50 m) Undeveloped ridges Bird sanctuaries Nature trails Areas of high conservation value (as determined by specialist ecologist) Areas with high habitat diversity (as determined by specialist ecologist) Areas with a low disturbance (as determined by specialist ecologist) Red Data fauna (from GDACEL) Red Data flora (from GDACEL) Natural land cover categories 7

8 8 SECONDARY OPEN SPACES MAIN CATEGORY Social open space Institutional Heritage Agricultural OS Categories Zoological gardens Sports facilities Recreational facilities Places of interest Places of worship Libraries Community centres SUB-CATEGORIES Municipal facilities Airports/airfields Educational facilities Public service facilities (e.g. police stations, post offices etc.) Health facilities (i.e. hospitals and clinics) Cemeteries Historical monuments Museums Art galleries Cemeteries of historical importance Archaeological sites Cultural sites Agricultural lands (including urban agriculture)

9 OS Categories TERTIARY OPEN SPACES MAIN CATEGORY SUB-CATEGORIES Refuse sites Mine dumps Prospective open space Slimes dams Landfill sites Mining land & quarries 9

10 Build/Import Datasets (Existing Ecological OS) Waterbodies Ridges 10

11 Build/Import Datasets (Desired Ecological OS) Areas with Low Disturbance Habitat Diversity 11

12 Build/Import Datasets (Ecological Network) Ecological OS 12

13 13 Build/Import Datasets (Secondary OS)

14 14 Build/Import Datasets (Tertiary OS)

15 Data Management (OS Ownership) OS Categories Valuations Information Private/Public OS 15

16 Data Management (OS Zoning) OS Categories Zoning Information Zoning Required (YES/NO) 16

17 Data Management (OS Development Status) OS Categories Parks Database Aerial Photograph Developed/Undeveloped 17

18 Data Verification BIODIVERSITY ASSESSMENT Field verification of Natural Areas within the City Identification of all Animal and Plant Species 18

19 Data Verification WETLAND AUDIT A Retain, conserve and expand the open space network. Wetland status and functioning within the ecosystem C B E Region Hectares A D F B C D E G F G Total Hectares:

20 GIS Analysis The true Power of GIS lies in the analysis GIS analysis shows you: Patterns, Relationships, and Trends. in your geographic data that help you: understand how the world works, make the best choice from among options, plan for the future 20

21 Open Space Provision GIS Analysis Calculation of OS hectares and Quantify within wards Provision of Openspaces International standard: 2.4ha/ 1000 people Provision of Openspaces X = OS/P*1000 Where by: X: is the ratio of openspces per 1000 people OS: is the total Ha of openspaces per ward P: is the total population of each ward Parks/OS Social OS 21

22 Outputs Table Format OPEN SPACE CATEGORY AREA (ha) % OF TOTAL AREA Ecological Existing Desired Social Institutional Heritage Agricultural Prospective Total

23 Outputs Graph Format Summary of OS Categories % Existing Ecological Desired Ecological Social Institutional Heritage Agricultural Prospective OS Categories

24 Outputs (Map Format) OS Categories Conservation Value 24

25 Outputs Biodiversity Hotspots OS Provision 25

26 26 Outputs

27 Decision-Making (DSS) Need for Decision Support System: Recognize the spatial environmental dataset as a strategic asset to the City Link to other City processes (i.e RSDF s) Easy accessibility of the OS database Regular and easy updating of the OS database Proper data management and maintenance KNOWLEDGE DECISION INFORMATION DATA 27

28 Remote Sensing Landuse 2004 Landuse

29 Remote Sensing Landcover

30 DISCUSSIONS / THANK YOU Makau Alfred Malatji Alfredmalatji@joburg.org.za