Bridging the gap

Optimising the value of your information asset

BRIDGING THE GAP

Gary AllemannMaster Data Management

Different ways…

...to represent location…

..means mistakes happen!

Ways of representing location

• Descriptions – unstructured text description• I live on Piet’s farm next to the mielie

fields.• Take the first right after the petrol station

and we are the white building on the left.

• Images

• Address – (Semi) Structured used to represent the location of a building or property

• 14 Fifth Ave, Rand Park Ridge, Jhb• 5delaan 14

Randparkrif2156

• Corner of Fifth Avenue and Rand Road, Randpark Ridge

• Geocordinates – a precise location on a map

May represent objects that do not have an address

• Meter• Road• ATM

The Focus RoomsCnr Kikuyu &

Leeukop StreetsSunninghill2157

Relational vs Spatial

Which corner?

Spatial represents an area

-26.035557,28.065022We select a point to represent this address

-26.035774,28.064682May vary (slightly) from one reference set to another

Typical South African address issues

Address 1 Address 2 Address 3

44 Gleneagles Road Greenside 2199

Tweedelaan 48 Nelville Johannesburg

18 Park Lane Parktown Johannesburg 2193

19 Park Lane Parktwon 2193

Aberdeenstraat 122 Melville 2092

101 Greenway Greenside

Stores Pool Bar Main Road 2092

Gleneaglesweg 42 Greensde Jhb 2034

No address standard – mis-fielded data

English and Afrikaans address data

Abbreviations, Spelling and Typing errors

Missing information or wrong post code

We need a good quality address

Missing information or wrong post code

Semi-structured to Structured

Number Street Name Street Type Suburb CityPost Code

44 Gleneagles RoadGreenside 2199

48 Tweede laanNelville Johannesburg

122 Aberdeen straat Melville 2092

Main Road 2092

42 Gleneagles weg Greensde Jhb 2034

Standardised & fix (common) errors

44 Gleneagles Road Greenside2199

48 2nd Avenue Melville Johannesburg

19 Park Lane Parktown 2193

122 Aberdeen Street Melville 2092

Main Road 2092

42 Gleneagles Road Greenside Johannesburg 2034

Enrich – add / correct missing info

48 2nd Avenue Melville Johannesburg

19 Park Lane Parktown 2193

122 Aberdeen Street Melville 2092

Main Road 2092

• International Sources• GPS, Mapping

• Local Sources• Surveyor General• Local Government• Commercial Sources

• Each has strengths and weaknesses based on your requirement and location – test to fit your need

• For example• 14.5 of 52 million South Africans live under

Trad Authority

Compare to reference data source

• Delivery and collections• Plan routes based on proximity• Identify and resolve errors before sending

driver out

• Territory management• Assign clients to appropriate reps

Improved planning improves efficiency

Case Study 1: Route Planning

48 2ND Avenue

101 Greenway

44 Gleneagles Road

18 Park Lane

Case Study: Route Planning

48 2ND Avenue

101 Greenway

44 Gleneagles Road

18 Park Lane

19 Park Lane does not exist in reference set!• Could have been wasted trip• Can either:

• Assume next to number 18• Call and confirm address before

travelling

• Planning based on 2001 Census data• Current population levels assumed

• +- 100million address records geocoded

• Geocoding gave• Understanding of area dynamics• Spatial targeting for services• Identification of delivery bottlenecks and

disparities

Case Study 2: Delivery of services

Standardise e.g. +- 600 variations of East London

Case Study: Delivery of services

Actual beneficiaries vs Assumed

Implications• Some areas underserviced e.g.

Umtata• Some areas either have an over-

allocation of resources e.g. Port Elizabeth or there are many candidates for services that are not registered in the area.

• Bridging the gap between address data and spatial data can bring significant benefits

• Different applications require varying levels of accuracy

• Data cleansing brings the improvements for address accuracy necessary to bridge this gap

Conclusion

• Gary Allemann• +27 83 632 1591• gary@masterdata.co.za• www.masterdata.co.za

Questions

Bridging the gap

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Transcript of Bridging the gap

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