geoteχs geo-information technology communication and consultancy services pictometry mathias...

GeoTeχs Geo-information Technology Communication and Consultancy Services

PictometryMathias Lemmens

Christiaan LemmenMartin Wubbe (The Netherlands)

(paper 2521)

6th FIG Regional Conference12-15 November 2007, San José, Costa Rica


Agenda

• Introduction• Pictometry• Goals• Results• Conclusions• Recommended Pilots


Tasks of the Cadastre

• Registration, management and releasing title information and geo-information

• Land development• Managing the national geodetic framework• Providing information products• Carrying out international activities

Total Number of Parcels Registered 8,568,274

Number of registered transaction acts in 2005 478,200

Number of registered mortgage acts in 2005 770,900

Number of information requests (2005) 18,907,473


Pictometry CharacteristicsGeo-referenced: ortho + oblique

GSD ortho: 15cm

GSD oblique: 10 – 18 cm

Ortho images AHN (5m)

30% Overlap (no stereo)

Flying Height: 1km

Size ortho: 350m x 560m

Pricing: € 250 / km2 / annum


Possible Applications• Homeland Security• Urban planning• Illegal Buildings• Fire departments• Disaster management• Signal propagation• Fly-Around Simulations• “Our Limit is Your

Imagination”


Research Aim

• How Pictometry may be of benefit to support the tasks and ambitions of Kadaster:

– To be the principal supplier of real estate and geo-information within the Netherlands

– Authoritative within Europe


Research Questions

• Accuracy?

• Updating topographic maps?

• Oblique images Traditional Photogrammetry?

• Measuring of cadastral boundaries?

• Costs?


Planar Accuracy

Ortho: 19cmOblique: 86cm


Elevation Accuracy

• Depends on accuracy AHN– Systematic error 5cm– Random error 15cm


Fuelling Station/Storage Place


Which side are the trees?


Looking Underneath

Buildings


Recognition of non-buildings


What crosses the Road?


Third Dimension


Traditional Pictometry

Advantages

-15cm 36 cm-View Underneath Objects-Height measuring tool-(oblique) attribute assignment-Software is easy and intuitive-Colour

Disadvantages

-No stereo (at present)-No polygon mapping


Preliminary Cadastral Boundaries (1)


Preliminaire Cadastral Boundaries (2)


Preliminaire Cadastral Boundaries (3)


Costs

• Investment; not only cost reduction in existing work processes

• Beneficial in the long term (production, goodwill, leadership)


Conclusions Strategic++

• Photogrammetry and oblique images

• Growth market– Cities 50.000+– OS, Cadastre Spain – Microsoft local.live.com

• Catalyser for GII• Accurate Survey tool, not

only viewing• Standard price: € 250 / km2

/annum


Conclusions Strategic--

• Stereo images• Functionality

software, integration GIS

• Exclusive License Blom (Europe)


Conclusions PictometryTactical/Operational++

• Identifying preliminary boundaries via notary• Building registration• Communication citizens and government• Maintenance topographic maps – if stereo• Add on to Top Map• 3D City Models• Easy, intuitive interface, very accessible• Navigation tool for entering databases (e.g.

building registration, WOZ)


Conclusions PictometryTactical/Operational--

• Additional functionality required• Footprint difficult identifiable• System needs DEM – not if stereo images• No integrated aero-triangulation


Preliminary Boundaries


1. Identification of boundaries in Notary office

• Prerequisites– Notary, representative sample of deeds, PC + software, HR,

data, € 20.000,--

• Expected Results– Better spatial orientation for parties – No identification in the field (50%)– Immediate Parcel Creation – New template for surveyor


2. Building Registration: suitability test with BAG designers

• Prerequisites– stereo pictometry, representative part of a Dutch city, DPW,

software, HR, BAG designers, data, € 35.000,--

• Expected Results– Desired / collectable data– Navigation tool

Additional Benefit– pro-active attitude towards VROM


3. Pictometry as navigation tool in cadastral portal

• Prerequisites– Extending KOL (prototype), HR, PC+software,

data, sessions with customers, € 50.000,--

• Expected Results– Customer’s reactions– easier access to data (e.g. BAG, WOZ)– overview of potential products and applications


Thank You for your Kind Attention

geoteχs geo-information technology communication and consultancy services pictometry mathias...

Documents

identification of boundaries

pc software

cmgsd oblique

cadastre registration

ortho obliquegsd ortho

title information

stereo imagesno

accessiblenavigation