New LPIS data and their quality control 15th GeoCAP Conference, Taormina, Italy 18 20 November 2009
Outline of the presentation Intro: About Macedonia 1. Design of LPIS 2. LPIS methodology 3. New spatial data (aerial images, DTM, digital orthophotomaps, initial LPIS data) 4. Monitoring and supervision of data production 5. Quality control of spatial data
Macedonia country with diverse nature and cultural heritage Tsar Samuil Fortress in Ohrid
Macedonia country with diverse nature and cultural heritage Plaošnik archeological site, lake Ohrid and Galičica mountains
Macedonia country with diverse nature and cultural heritage Agricultural landscape near Mavrovo lake
1. Design of LPIS
Project on LPIS design Carried out by company EKOTOXA in the frame of the World Bank Agriculture Strengthening and Accession Project (ASAP) for Ministry of Agriculture, Forestry and Water Economy (MAFWE) from 10/2008 to 04/2010 Complex assistance project carried out by the team of six experts in close co-operation with MAFWE counterpart staff
Project on LPIS design main Input analysis tasks Legislative framework and organizational structures Hardware and software infrastructure Data registers and relevant spatial data Development of methodology Methodology for establishment of LPIS LPIS data model and links to related databases Required human resources and organizational structures Development of technical specifications and tender documentation Aerial photography, orthophoto production and LPIS digitalization LPIS software LPIS hardware and desktop GIS software
Project on LPIS design main tasks Development of procedures and guidelines Orthophoto quality check manual Photointerpretation manual Procedures and guidelines for quality control of LPIS data Test procedures for LPIS software and hardware Training of MAFWE staff Monitoring of the process of LPIS implementation Testing of delivered LPIS software and hardware Quality control of delivered spatial data Digital orthophotomaps DTM Initial LPIS data
Project on LPIS design
2. LPIS methodology
Main features Reference parcel: farmer block Computer-assisted photo interpretation - on-screen digitization using digital orthophoto maps Link between photointerpreted agricultural land and the farmers shall be established during direct consultations with farmers On-going vineyard registration will be merged with the process of LPIS creation LPIS reference parcel layer shall hold the following information: parcel geometry, unique ID, area, perimeter, land use category, farmer ID, administrative unit ID, and terrain characteristics Continuous cartographic representation will be used for the entire LPIS database all reference parcels will be stored in single database using national projection system
LPIS geographic layers
Creation of LPIS Digitalization of initial LPIS data Consultations with farmers Final LPIS database (external contractor) (local offices MAFWE ) 1. 2. 3. (MAFWE )
Creation of LPIS initial LPIS Digitalization of initial LPIS data 1. (external contractor) Digitalization of physical boundaries of agricultural land on the whole territory of Macedonia Result: Initial LPIS data layer, which will be used as input data during consultations with farmers
Creation of LPIS initial LPIS Digitalization of initial LPIS data 1. (external contractor) Working process: Overview of the area intended for digitization Vectorization of permanent boundaries of agricultural land Land use attributing Topology controls and final quality checks
Creation of LPIS consultations Consultations with farmers 2. (local offices MAFWE ) Farmers identify agricultural land under cultivation and provide required information Consultants update initial LPIS data using web-based software application Result: Attributed farmer blocks
Creation of LPIS consultations Consultations with farmers 2. (local offices MAFWE ) Working process: Registration of the farmer in the Farm register or check and possible update of already registered information Identification, delimitation and attributing of farmer blocks in LPIS Identification of vineyards and declaration of data required in National Vineyard Register (as regards farmer blocks classified as vineyard or mixed permanent crop)
Creation of LPIS finalization Final LPIS database 3. (MAFWE) Spatial analyses with external data Automatic calculation of area and perimeter of farmer blocks Automatic classification according to administrative units and terrain characteristics Final LPIS database will be constantly maintained and updated using web-based LPIS software application
3. New spatial data (aerial images, DTM, digital orthophotomaps, initial LPIS data)
Content of required data package Aerial images covering the whole territory of the country (25.713 sq km), acquired using large format digital photogrammetric camera in 2009 New digital terrain model (DTM) grid 5m, height accuracy ±2m Digital orthophotomaps - ground sampling distance 50cm, RGB and CIR, horizontal accuracy RMSE 1.5m Initial LPIS data classified polygons of agricultural land covering the whole territory of the country
Background November - December 2008 Preparation of technical specifications January - April 2009 Bidding document sent to World Bank for approval Launch of tender Evaluation of bids Signing of contract (selected contractor: Geodis Brno) May 2009 January 2010 Execution of the contract Price (aerial images, DTM, digital orthophoto RGB and CIR, initial LPIS data): approx. 25 EUR per sq km
One data package, one contractor, complete coverage Easy to prepare and manage the bidding procedure Self interest of the contractor for high quality data (digital orthophoto) for digitization of LPIS data The digitalization itself is a kind of internal QC of produced orthophotomaps Producer of LPIS data cannot make excuse for bad quality of orthophotomaps Complete, up-to-date and homogeneous data coverage Easy to monitor and supervise the whole process of data production
Image acquisition dates Image acquisiton date Number of images 2009-06-15 657 2009-06-16 1250 2009-06-17 816 2009-06-20 55 2009-07-08 162 2009-07-13 64 2009-07-14 47 2009-07-15 427 Total: 3478 June July
Orthophoto 2004 JICA project Macedonia
Google Earth image
Orthophoto 2009 LPIS project Macedonia
Examples of produced data
Examples of produced data
Examples of produced data
Examples of produced data
4. Monitoring and supervision of data production
Tasks Regular missions to contractor s premises Exchange of information with contractor s staff via e-mail Review of technical documents and reports issued by the contractor Analysis of obtained samples of data Continuous monitoring of the work progress Regular reporting to the Client
Status of orthophoto production 16 November 2009
Status of initial LPIS digitalization 16 November 2009
Distribution of the work to operators
5. Quality control of spatial data
QC tasks Completeness check of delivered images, DTM and digital orthophotomaps (check whether the delivery is in line with technical specifications) 100% of delivered data Visual check of radiometric quality and mosaicing 100% of delivered orthoimages Geometry QC according to the JRC methodology - 7% of delivered orthoimages Visual QC of photointerpretation according to developed methodology 10% of delivered initial LPIS data
Chosen approach The checks are carried out jointly by the members of the project team and MAFWE counterpart staff Preparation and implementation of QC: Development of methodology and preparation of manuals Introductory training for MAFWE staff On-job training during the work with data Operational QC under supervision of experienced project team members Processing of QC results, reporting Outputs: Trained and experienced MAFWE staff Checked LPIS data
Chosen approach
Geometry QC of orthoimages Carried out according to the JRC methodology measurement of selected check points (CPs) on the orthoimages as well as in the terrain using D-GPS In total 400 CPs selected on 15 map sheets (out of 205) - 25-30 CPs per map sheet Terrain measurement carried out by Hungarian company B3 (October November 2009) Discrepancies for each CP and RMSEx and RMSEy for each orthoimage will be calculated (Pass: RMSE 1.5m, Fail: RMSE > 1.5m)
Geometry QC of orthoimages
Geometry QC of orthoimages CP MK_1234, nearby Skopje, 05 November 2009
QC status Digital orthoimages BLOCK 1 delivered on 08.10.2009, completeness check 100%, in total 38 map sheets (100%) checked and passed (radiometry and mosaicing) BLOCK 2 and BLOCK 3 delivered on 12.11.2009, QC in progress Initial LPIS data BLOCK 1 delivered on 4.11.2009, completeness check 100%, 4 map sheets (10 %) selected for visual check, QC in progress Geometry QC of digital orthoimages 400 CPs selected, terrain measurement currently in progress (should be finished until the end of November)
Project team and support: TA for LPIS design: Pavel TROJACEK, Csaba WIRNHARDT, Jan AUSFICIR, Adam, Michal BROKL, Cestmir KANTOR MAFWE: Perica IVANOSKI, Ljupco CHADINOSKI, Saso NIKOLOVSKI World Bank ASAP project: Vlatko MRKEV, Nadica JOVANOVSKA, Ana FLIN, Sasa VUKELIC Thank you for your attention!