spatial sampling strategy modirisk. modirisk kick-off-meeting basis for sampling strategy grid of...
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MODIRISK Kick-off-meeting
Basis for sampling strategyBasis for sampling strategy
Grid of 10X10 km = 326 cells
Three samples per grid cell = 978 samples
Take into consideration:→ Major biotopes→ Seasonal variation→ Import risk
Grid of 10X10 km = 326 cells
Three samples per grid cell = 978 samples
Take into consideration:→ Major biotopes→ Seasonal variation→ Import risk
MODIRISK Kick-off-meeting
Proposed procedureProposed procedure
Identify key habitats based on Corine LC classes by aggregating urban, agriculture, natural and import risk classes.
Calculate total surface per aggregated class
Assign proportional number of sample points to aggregated class.
Generate appropriate number of random sampling points within each class.
Randomly assign sampling points within each class to two sampling seasons.
Geocode and assign sample sites per team.
Identify key habitats based on Corine LC classes by aggregating urban, agriculture, natural and import risk classes.
Calculate total surface per aggregated class
Assign proportional number of sample points to aggregated class.
Generate appropriate number of random sampling points within each class.
Randomly assign sampling points within each class to two sampling seasons.
Geocode and assign sample sites per team.
MODIRISK Kick-off-meeting
Aggregation of CORINE LC dataAggregation of CORINE LC data
CORINE includes 50 classes divided in five groups:→ Artificial surfaces including
urban and industrial→ Agriculture areas→ Forest and semi natural
areas→ Wetlands→ Water bodies
CORINE includes 50 classes divided in five groups:→ Artificial surfaces including
urban and industrial→ Agriculture areas→ Forest and semi natural
areas→ Wetlands→ Water bodies
MODIRISK Kick-off-meeting
Class aggregationClass aggregation
(1) Urban biotopes
(2) Land in the agriculture cycle
(3) Natural terrestrial habitats
(4) Risk of introduction areas: ports, airports, dump sites, moors and heat land, inland marshes, salt marshes
(5) Areas excluded from sample: industrial and commercial units, roads, mines and mineral extraction sites, construction sites, sparsely vegetated areas
(6) Water bodies
(1) Urban biotopes
(2) Land in the agriculture cycle
(3) Natural terrestrial habitats
(4) Risk of introduction areas: ports, airports, dump sites, moors and heat land, inland marshes, salt marshes
(5) Areas excluded from sample: industrial and commercial units, roads, mines and mineral extraction sites, construction sites, sparsely vegetated areas
(6) Water bodies
MODIRISK Kick-off-meeting
Sample size per aggregated class
Sample size per aggregated class
Class Pixels Percentage Samples
Urban 769,723 17.7% 173
Agriculture 2,514,104 57.7% 564
Natural 888,272 20.4% 199
Specific 56,479 1.3% 13
Secondary 103,411 2.4% 23
Water bodies 28,285 0.6% 6
TOTAL 4,360,274 100.0% 978
In blue = automated random assignment
In red = manual attribution in selected areas
In blue = automated random assignment
In red = manual attribution in selected areas
MODIRISK Kick-off-meeting
173 random urban sampling points173 random urban sampling points
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MODIRISK Kick-off-meeting
564 random agri sampling points564 random agri sampling points
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MODIRISK Kick-off-meeting
199 random natural sampling points199 random natural sampling points
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MODIRISK Kick-off-meeting
Non-random sampling pointsNon-random sampling points
Not yet included in map
42 sampling points to be allocated in areas representing a particular risk of introduction: ports, airports, dump sites, moors and heat land, inland marshes, salt marshes.
Additional samplings should also be conducted in other selected areas:→ Zoos and safari parks (list available)→ Second hand tire import/storage (list to
be established)→ Protected areas involving presence of
large numbers of migratory birds (list available)
Not yet included in map
42 sampling points to be allocated in areas representing a particular risk of introduction: ports, airports, dump sites, moors and heat land, inland marshes, salt marshes.
Additional samplings should also be conducted in other selected areas:→ Zoos and safari parks (list available)→ Second hand tire import/storage (list to
be established)→ Protected areas involving presence of
large numbers of migratory birds (list available)
MODIRISK Kick-off-meeting
Sample: institute / year / seasonSample: institute / year / season
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MODIRISK Kick-off-meeting
Sample per instituteSample per institute
Rough division by province:→ ITG (274 + 42): Antwerp,
Limburg, Brabant→ KBIN (293): Oost
Vlaanderen, West Vlaanderen, Brabant
→ UCL (365): Hainaut, Namur, Luxembourg
Needs reassessment !!!
Rough division by province:→ ITG (274 + 42): Antwerp,
Limburg, Brabant→ KBIN (293): Oost
Vlaanderen, West Vlaanderen, Brabant
→ UCL (365): Hainaut, Namur, Luxembourg
Needs reassessment !!!
MODIRISK Kick-off-meeting
Data baseData base
Flexibility to re-allocate sampling areas
Geocode random sampling points to nearest relevant feature to ease sampling: road access, street names, house numbers, …
UTM numbering grid cells according to standard
Flexibility to re-allocate sampling areas
Geocode random sampling points to nearest relevant feature to ease sampling: road access, street names, house numbers, …
UTM numbering grid cells according to standard
MODIRISK Kick-off-meeting
Web based MODIRISK survey map
Web based MODIRISK survey map
Online map (Google map) with status of field survey per team
Public access: important dissemination purpose because most urban samples will be conducted in house gardens
Link to entomological data base future link with biodiversity data base
Password protected centralized data entry using Palmtop:→ Field forms→ Entomology forms→ Cross check forms
Generate addresses in urban areas to contact prior to sampling
Online map (Google map) with status of field survey per team
Public access: important dissemination purpose because most urban samples will be conducted in house gardens
Link to entomological data base future link with biodiversity data base
Password protected centralized data entry using Palmtop:→ Field forms→ Entomology forms→ Cross check forms
Generate addresses in urban areas to contact prior to sampling