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Point of the agenda LUCAS 2008/2009 : the Core Survey

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Presentation on theme: "Point of the agenda LUCAS 2008/2009 : the Core Survey"— Presentation transcript:

1 Point 3.2.1 of the agenda LUCAS 2008/2009 : the Core Survey
WORKING GROUP "Land Cover/Use Statistics" 20 October 2009,Luxembourg, LUCAS TEAM 1

2 Contents Coverage Informative contents Nomenclature Sampling strategy
Quality assurance DMT

3 Coverage 2008/2009 Member States Sampling size Austria 4,969 Latvia
Austria 4,969 Latvia 3,827 Belgium 1,808 Lithuania 3,864 Bulgaria * 8,100 Luxembourg 153 Czech Republic 4,674 Malta ** 80 Denmark 2,554 Netherlands 2,461 Estonia 2,680 Poland 18,530 Finland 19,946 Portugal 5,426 France 32,417 Romania * 20,600 Germany 21,157 Slovakia 2,895 Greece 7,819 Slovenia 1,201 Hungary 5,513 Spain 29,917 Ireland 4,165 Sweden 26,665 Italy 17,851 United Kingdom 14,508 Total 263,780 *Survey took place in 2008 ** Survey financed with national funds

4 Informative content Parameters: Land cover (1 & 2) Land use (1 & 2)
Land Cover percentage Area size Height of trees Width of features Transect (250 m to east) with Land Cover and linear features Land management (grazing) Water management SOIL SAMPLE West East North South

5 USEFULNESS OF PICTURES
In 2006 a study on multi-dimensional cross-analysis of LUCAS data was launched The objectives of the study were to select and further develop a set of landscape indicators on the basis of already existing landscape indicators to deploy innovative state of the art methods for optimizing the usage of the whole of the LUCAS campaigns data (landscape photos and tabular data)

6 ANALYSIS OF TABULAR AND PICTURE LUCAS data
Indicator 01 (a & b) Structural Elements Index Indicator 02 Landform Visual Envelope (Skyline) Index Indicator 03 Granularity Index (vertical heterogeneity) Indicator 04 Land Cover Predominance Index Indicator 05 Biological Habitats Index Indicator 06 (a & b) Land Use/Cover Diversity Index Indicator 07 Soils at Risk Index >> Analysis of photos, orthophotos and data together

7 Landscape photo analysis
Original Smoothing Segmentation Calculation of the number of intersects

8 LUCAS 2008/2009: Nomenclature Fully hierarchical (3 levels)
Land cover and land use clearly distinguished Comparable with other main international nomenclatures (e.g. FFS agriculture, FAO, forestry) Some new parameters introduced Forest types have been introduced for forestry areas, in line with the EUNIS classification on forests (

9 Nomenclature LUCAS 2008/09: Land Cover
Built-up areas A20 Artificial non built-up areas B10 Cereals (+ triticale) B20 Root crops B30 Non permanent industrial crops B40 Dry pulses, vegetables and flowers B50 Fodder crops B70 Fruit trees & berries B80 Other Permanent Crops C10 Broadleaved and evergreen woodland C20 Coniferous woodland C30 Mixed woodland D10 Shrubland with sparse tree cover D20 Shrubland without tree cover E10 Grassland with sparse tree/shrub cover E20 Grassland without tree cover E30 Spontaneous vegetation F00 Bare Land G10 Inland water bodies G20 Inland running water G30 Coastal water bodies G50 Glacier, permanent snow H10 Inland wetlands H20 Coastal wetlands Temporary grassland B55 Mixed cereals for fodder B54

10 Nomenclature LUCAS 2008/09: Land Use
Agriculture ( + Kitchen garden + Fallow land) U120 Forestry U130 Fishing U140 Mining, Quarrying U150 Hunting U210 Energy production U220 Industry & Manufacturing U310 Transport, communication, … U320 Water & waste treatment U330 Construction U340 Commerce, Finance, Business U350 Community Services U360 Recreation, Leisure, Sport U370 Residential U400 Unused New class

11 Sampling strategy: sampling design
points LAND COVER classes 1 ARABLE LAND 2 PERMANENT CROPS 3 GRASSLAND 4 WOODED AREAS AND SHRUBLAND 5 BARE LAND, RARE VEGET. 6 ARTIFICIAL LAND 7 WATER First phase sample for stratification: orthophoto interpretation 2km squared grid Ground survey Parameters Land cover Land use pictures etc. Sample of around 260,000 pts Second phase sample: in-situ data collection

12 Sampling design : Aims :
obtaining a reasonable balance among the strata (the agricultural strata were over-represented in the previous rounds of the survey) since the focus of the survey changed from a merely agricultural to a broadly agro-environmental one; providing reliable estimates at a geographical level more detailed than the EU one for the most relevant land cover classes in the various countries; gathering longitudinal data on land cover and land use to monitor their changes (for the countries involved in the 2006 round).

13 Sampling design: expected errors at NUTS2 level
LAND COVER CLASSES UPPER BOUND EXP. ERRORS Cereals 15% Root crops, Vegetables, floricolture, ornamental plants 25% Fibre and oleaginous crops, non permanent industrial crops Fodder and temporary grassland Permanent crops and nursery Grassland 7.5% Broadleaved woodland 20% Coniferous woodland Mixed woodland Shrubland Bare land Artificial areas Water

14 Sampling drawing: Selection of points: criteria
LUCAS 2006 sample points are included as much as possible (panel approach) Points above 1000m and very difficult to access are excluded Strategy to reduce autocorrelation among points

15 Points selection strategy: recourse to replicates
To reduce the autocorrelation within and between strata: GRID (2km*2km) is divided into squared blocks of 81 points each Pts coordinates are translated in relative position in the block numbering of the replicates is done under the constraint that the distance with the previous one is maximized Replicates are then selected successively in each stratum (starting with replicate 1) until the required sample size by domain is reached. From the replicate with the highest number, points are randomly selected

16 Point 3.2.1 of the agenda LUCAS 2008/2009 : the Core Survey
WORKING GROUP "Land Cover/Use Statistics" 20 October 2009,Luxembourg, LUCAS TEAM Second part 16

17 Quality assurance - Actions put in place:
Different actors/levels of control Several training steps Continuous monitoring Independent data quality check Standardisation and computerisation of the main phases of data management

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19 DMT – Data Management Tool: main functions
Point management: Data Entry Tool (supervised data entry, consistency and ranges check); Data Import (sent forward by one step lower level or sent backward by one step higher level); Data export; Point assignment; Report builder; Language choice.

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24 Schedule for the 2009 Survey

25 Table A – LUCAS 2009: overall situation at 16/10

26 Table B – Import progress (points received by Eurostat)

27 Import progress: points received by Eurostat (%)

28 Dissemination plan Final results are expected to be ready by June 2010, Preliminary results will be issued in the meantime Figures on land cover and use resulting from LUCAS 2009 will be uploaded and integrated in new-Cronos “Statistics in Focus” is expected by the end of the year


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