Total Pageviews

Saturday, 16 November 2013

Implementing GIS to tackle local government issue - Part 3

Part 2: http://daneshatlas.blogspot.com.au/2013/11/implementing-gis-to-tackle-local_13.html

Steps Required Making the Product:

     1) All the datasets are compiled and stored in a geodatabase. The metadata and the projections used in these datasets are checked to ensure consistency. Functions needed are data inputs into geodatabases (network, feature datasets)

         2) Since the product (Current Accessibility of City of Yarra) involves various maps, analysis on datasets are done separately to simplify the operations. For example, GIS analyst focusing on clinical accessibility would use datasets on population characteristics, transportation network and clinical locations. The analysis would involve network analyst and geocoding addresss. The GIS analysts may consider imposing index values for accessibility.

     3) Once the maps are done, the GIS analyst(s) should ensure the maps produce meet good quality cartographic standards. These maps initially produced in hardcopy format are submitted to town planning officers to assess the current accessibility.

     4) A web-enabled GIS is created meantime integrating the spatial data used in the project. GIS analyst(s) and/or cartographic technicians will design the website and the necessary characteristics of the online maps. This website is accessed to city council’s intranet. At the same time, list of existing facilities and the total targeted population (income disadvantaged) served are produced in documents (hardcopy formats).

Frequency of Use:
Function
Number
Dataset Input
1
Geocoding addresses
4
Creating Network dataset
2
Population characteristics input
4
Spatial Analysis (Closest Facility)
2
Create ArcGIS reports
1
Cartographic Editing
1
Printing
1
Display in website
1
Updating
4
List/other documents production
16

Product
Annual Production
Maps (Hardcopy)
80
Lists/Documents generated
80
Website
1

Logical Linkages:
Logical Linkages
Examples
List to graphic entity
Street address to community service facilities
Map to map
Topological network of the map overlayed on residential maps
Facility map showing locations to community service facilities
Attribute to attribute
Population characteristics to census collection districts
Type of clinic to clinic locations
  
 Error Tolerances:
Error Type
Error
Tolerance
Referential
Incorrect facility attributes
Incorrect facility names
5%
5%
Topological
Disconnect in street networks
Disconnect in public transportation network
0%
0%
Relative
Incorrect locations of public transport stops (wrong side of street)
+ 5m
Absolute
Incorrect street address

+2.5m

Wait Tolerance: Low (10-60seconds) and Medium (1-5 minutes). These tolerance categories are justified for the products as there are not urgent in production and they have limited dynamics.

Response Tolerance: For hardcopy maps, the time required from start to finish is 8 hours minimum. This has taken into consideration of the GIS officer has 1 year working experience in GIS and the analysis involved in producing the map. If the product was requested for the first time, it will be 16-24 GIS hours work due to datasets cleaning and other associated works. For the website, it will be additional 8 hours minimum, in addition of 2 hours of integration of GIS data into the online system. The updates to the online GIS system roughly consume maximum of 3 hours.

Current Costs:

      1) GIS dataset costs

Datasets
Cost
Address
$756
Administrative Boundaries
$1584
Planning
$223
Property
$893
Transport
$112
Total
$3568

      2)   Labour, other related and Total costs


Hours
Annual Cost for making
Total Costs (AUD)
Labour (hardcopy)
60
$192*(1 product)
$15360
Labour (website)
22
$506
$506
Miscellaneous


$200
Datasets


$3568
Total


~$19700
           *-Excluding website cost. Hourly rate is minimum $23 per hour

Benefit Analysis:

      1) Financial savings category: With implementation of GIS in this strategy, it would eliminate costs required to hire consultants.

      2) Direct benefits to organisation: With GIS, the town planners are able to make informed decisions of providing facilities. They too would be able to estimate appropriate costs involved through the output maps.

c    3) External benefits: The general public will be well served indirectly through GIS implementation. The future facility and affordable housing will be well placed to serve the disadvantage population. The state government is able to access these maps or web-GIS to assess the achievements of city council.

Sign off: The head of SPU will be signing off the IPDs and benefit analysis statements. Finally, every sample hardcopy product must require signature of the head to demonstrate his/her satisfaction of the product.

No comments:

Post a Comment