land cover mapping and land cover changes
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LAND COVER MAPPING AND LAND COVER CHANGES. WRI - FAO - DRSRS. Charles Situma [email protected]. Project financed by the World Resources Institute (WRI) carried out by FAO Food and Agriculture Organization of the UN in collaboration with - PowerPoint PPT PresentationTRANSCRIPT
LAND COVER MAPPING AND LAND COVER CHANGES
Project financed by the World Resources Institute (WRI) carried out by
FAO Food and Agriculture Organization of the UN in collaboration with
Kenya Department of Resource Surveys and Remote Sensing (DRSRS)
WRI - FAO - DRSRS Charles Situma
DEPARTMENT OF RESOURCE SURVEYS AND REMOTE SENSING (DRSRS)
MANDATECollection, storage, analysis, updating and dissemination of geo-spatial information on natural resources and environment to facilitate informed decision-making for sustainable development
The data collected by the department forms the basis for formulation of sound development plans, policies and strategies various government ministries and agencies.
DRSRS strives to meet objectives and aspirations of the Ministry and GoK as outlined in Vision 2030
Publications
Project purposes:
- Update of Kenya land cover map (FAO Africover database) 2000 -
2010
- Land Cover Changes Analysis
DELIVERABLES
- National harmonized land cover legend based on FAO/UNEP Land Cover Classification System (LCCS)
- National Land Cover Database
- National Land Cover Changes database (shapefile and mdb)
PRODUCT DISSEMINATION
-The data is hosted by DRSRS
- Results could be downloaded through FAO’s geospatial data portal GeoNetwork
• Satellite - Images acquisition
• Object based segmentation – Definiens Ecognition Software
• Legend - based on FAO Land Cover Classification System / Africover
• Prelabeling of images based on former FAO Africover Data
• Interpretation detail enhancement new tools for classification and labeling - FAO Madcat Software
• Fieldwork Activities
• Topology check
• Interpretation review based on field work results
• Review of homogenity and consistency of interpretation between photointerpreters
• Review of Database fields and codes
• GIS review – final topology check
• Final database output – Data overview through FAO ADG Software
Satellite image interpretation for land cover mappingLand Cover update - Workflow
1) Satellite images
Landsat (2000)Landsat (2005) Aster Google Earth
Landsat Aster Google Earth
Overview Landsat image index
Overview Aster image index
FIELDWORK ACTIVITIES
A fieldwork campaign was carried out in March 2011. Areas to be surveyed were defined following a regular
grid of 0.5 degrees 10*10 Km (ECONET)
According with the accessibility of the areas
(security issues, road network, time schedule) were defined 1 to 4 land
cover classes to survey for each area.
If the plot could not be reached, the points were selected out of the box in
nearby areas.
The map shows the points for each one of the 3 fieldwork teams with additional points within the 10 km plots.
(Source: DRSRS Final Report on Fieldwork Activities)
A sample field data record sheet filled in the field during survey –MDB format
The total points visited by the 3 groups are as follows,Group1 : 60 pointsGroup2: 84 pointsGroup3: 50 points.
Sample point selection
The FAO Afrocover methodology for land cover field survey was illustrated in the last 2 days of the workshop held in DRSRS in January 2011.
Due to the fact that the preliminary interpretation was not yet completed was defined to use a regular grid as source to define the field points, as mentioned in the previous slide.
Within this areas, according with the accessibility and land cover type available in the area, were defined specific locations to survey (1-4 points for each block).
Each sample plot measured 10 Km x10 Km Figure 3.2). At least three sample points were surveyed in each plot The full procedure was run from the accessibility assessment, to the
definition of field work results output.
Sampling area
Sample point
10 Km
10
Km
Field Survey KE_167Picture direction WField Survey KE_167Picture direction S
For Each poin were recorded information about the land cover and 4 pictures in the cardinal directions N E S W
The survey number and picture direction are visible in the blackboard in the picture
After the field work, the data was downloaded and loaded in ArcGIS with all the details of each plot no and corresponding
photos of each plot. An hyperlink was created in order to view the pictures linked to each point clicking on the point symbol
LegendClass User Name
Map Code LCCS Gis Code
A11 - Cultivated and managed terrestrial areas
LCCS Class Name
Broadleaved evergreen forest plantation1TPLbe 10153-1-W7
Needleleaved evergreen forest plantation1TPLne 10153-5671-W7
Permanently cropped area with rainfed tree crops. Large sized fields (> 4 ha)1TLPL 10495-11341-W7
Citrus plantation. Surface Irrigated1TLMi_ci 10499-1888-S0606W8
Small sized fields (<2ha) of rainfed tree crops1TS 10541-W8
Scattered Isolated small fields (<2ha) of rainfed tree crops1TS-is 10557-W8
Large to medium (>2ha) sized rainfed shrub crops.1SLM 10567
Large to medium (>2ha) sized rainfed shrub crops. Pineapple1SLM_p 10567-S0619
Large to medium (>2ha) sized rainfed shrub crops. Coffee1SLM_co 10567-S0802
Large to medium (>2ha) sized rainfed shrub crops. Tea1SLM_t 10567-S0804
Large to medium (>2ha) sized rainfed shrub crops. Sisal1SLM_s 10567-S0913
Small (<2ha) rainfed shrub crops1SS 10613
Scattered Isolated small (<2ha) rainfed shrub crops1SS-is 10629
Large to medium (>2ha) rainfed herbaceous crops1HLM 10637
Large to medium (>2ha) rainfed herbaceous crops. Cereals1HLM_ce 10637-S3
Large to medium (>2ha) irrigated herbaceous crops.1HLMi 10651
Large to medium (>2ha) irrigated herbaceous crops. Sugar cane1HLMi_su 10651-13227-S0915
Scattered isolated large to medium (>2ha) rainfed herbaceous crops1HLM-is 10717
Scattered isolated large to medium (>2ha) rainfed herbaceous crops. Cereals
1HLM-is_ce 10717-S3
Small (<2ha) fields of rainfed herbaceous crops.1HS 10756
Small (<2ha) fields of rainfed herbaceous crops. Second layer: sparse trees1HS+2TS 10285 + 20053
Small (<2ha) fields of rainfed herbaceous crops on sloping land. Second layer: sparse trees
1HSS+2TS 10756-L2 + 20052
Small (<2ha) fields of rainfed herbaceous crops. Cereals1HS_ce 10756-S3
Small (<2ha) fields of post flooding herbaceous crops1HSY 10760
Small (<2ha) fields of irrigated herbaceous crops.1HSi 10763
Scattered isolated small (<2ha) fields of rainfed herbaceous crops1HS-is 10796
Scattered isolated small (<2ha) fields of rainfed herbaceous crops. Cereals1HS-is_ce 10796-S3
Scattered Isolated Small (<2ha) fields of post flooding herbaceous crops1HSY-is 10800
Greenhouse1GH 11438-11971(2)[Z4]
70 classes
A12 – Natural or semi-natural terrestrial vegetation
Class User NameMap Code LCCS Gis Code
LCCS Class Name
Tree closed (>65%)2TC 20282
Closed (>65%) broadleaved evergreen forest2TCbe 20634
Closed (>65%) bamboo forest2TCba 20282-Zt2
Trees open (40-65%) with shrubs closed to open (15-65%).2TO_sco 20326-1
Trees very open (15-40%) with shrubs closed to open (15-65%).2TVO_sco 20326-3012
Trees very open (15-40%) with sparse (<15%) shrubs2TVO_ss 20336-3012
Sparse Trees (< 15%) on sparse (<15%) herbaceous2TS 20505
Closed (>65%) shrubs2SC 20357
Open (40-65%) shrubs2SO 20385-1
Very open (15-40%) shrubs2SVO 20385-3012
Very open (15%-40%) shrubs with sparse (<15%) trees2SVOTS 20393-3012
Sparse (<15%) shrubs2SS 20511
Closed to Open (15-100%) herbaceous2HCO 21644
Closed to open (15-100%) herbaceous with sparse (<15%) trees2HCOTS 21646
Sparse (<15%) herbaceous2HS 20060
A23 – Cultivated aquatic or regularly flooded areas
Class User NameMap Code LCCS Gis Code
LCCS Class Name
Large to medium (>2ha) paddy rice fields3RLM 3030-S0308
Small(<2ha) paddy rice fields3RS 3045-S0308
A24 – Natural or semi-natural aquatic vegetation
Class User NameMap Code LCCS Gis Code
LCCS Class Name
Closed (>65%) trees on permanently flooded land. Brackish water4TCFFbr 40040-R2
Open (15-65%) trees on temporarily flooded land4TOF 40047
Open (15-65%) shrubs on temporarily flooded land4SOF 40053
Closed to Open (15-100%) Shrubs On Permanently Flooded Land4SCOFF 41970
Closed to open (15-100%) herbaceous with sparse (<15%) trees on temporarily flooded land
4HCOTSF 42175
Closed to open (15-65%) herbaceous on permanently flooded land4HCOFF 42347
Closed to open (15-100%) herbaceous on temporarily flooded land4HCOF 42348
B15 - Artificial surfaces and associates area(s)
Class User NameMap Code LCCS Gis Code
LCCS Class Name
Urban areas5U 5003-9
Rural areas5UR 5003-9-A44Zp1
Airport5A 5003-A21
Refugee camp5UC 5003-A34
Quarries5Q 5004-2
B16 – Bare area(s)
Class User NameMap Code LCCS Gis Code
LCCS Class Name
Bare rock6R 6002-1
Gravels, Stones And/Or Boulders. River bank and rock debris6GR 6002-2
Bare soil6S 6005
Loose sand6L 6006
B27 – Artificial water bodies, snow and ice
Class User NameMap Code LCCS Gis Code
LCCS Class Name
Artificial lake and pund7WS 7002-5
B28 – Natural water bodies, snow and ice
Class User NameMap Code LCCS Gis Code
LCCS Class Name
Perennial rivers8WFP 8002-1-V1
Perennial lakes8WSP 8002-5
Non-Perennial Natural Waterbodies (Flowing) with Scattered Vegetation8WFTv 8003-1-U1
Seasonal rivers8WFT 8003-4
Seasonal lakes8WST 8003-7
Tidal area8Wt 8004-19
Perennial snow8SP 8006
KE_183_A
KE_050_A
KE_092_3
KE_092_3
KE_102_2
Land Cover Interpretation
Kenya Land Cover Map
Preliminary Results Overview
Kenya LC database before
field survey activity
Land Cover Data – National Level
1 Total Areas: 1970’s, 1980’s, 2000, 2010
2 Changes: area values - percentages
Results Overview
Forest, Agriculture, Urban areas
Area Km2
Land cover type
Results Overview
Overview: Spatial DistributionKenya 2000
Tree closed, Tree open
and Woody closed areas
Results – Woody Coverage
Closed forest coverage – Kenya Provinces
Results
Results
Urban areas – Kenya Provinces
Forest Plantations – Kenya Provinces
Results
a Agricultural Area Changes – Areal Distribution Of Changesa1) 1970’s - 2000
a2) 1970’s - 1980’sa3) 1980’s - 2000
b Agricultural Field Densityb1) 1970’sb2) 1980’sb3) 2000
Results – Agriculture
Agricultural areas – Kenya Provinces
Ag
ricu
ltu
ral A
reas K
m2
Results – Agriculture
Kenya Land Cover Change analysisAgricultural areas
The map shows the field density within the polygon area. According with LCCS in the agricultural fields classification
there are 3 levels of spatial distribution:•Continuous fields
•Scattered clustered •Scattered isolated
Continuous fields cover > 80% of the polygon area when in single class codes and 50-80%
when in mixed unitsScattered clustered between 20 and 50%
of the polygon areaScattered isolated between 10 and 20%
of the polygon area
Agricultural field density 1970’s
Results – Agriculture
Kenya Land Cover Change analysisAgricultural areas
The map shows the field density within the polygon area. According with LCCS in the agricultural fields classification
there are 3 levels of spatial distribution:•Continuous fields
•Scattered clustered •Scattered isolated
Continuous fields cover > 80% of the polygon area when in single class codes and 50-80%
when in mixed unitsScattered clustered between 20 and 50%
of the polygon areaScattered isolated between 10 and 20%
of the polygon area
Agricultural field density 1980’s
Results – Agriculture
Kenya Land Cover Change analysisAgricultural areas
The map shows the field density within the polygon area. According with LCCS in the agricultural fields classification
there are 3 levels of spatial distribution:•Continuous fields
•Scattered clustered •Scattered isolated
Continuous fields cover > 80% of the polygon area when in single class codes and 50-80%
when in mixed unitsScattered clustered between 20 and 50%
of the polygon areaScattered isolated between 10 and 20%
of the polygon area
Agricultural field density 2000
Results – Agriculture
Forest, Agriculture, Urban land cover area
Area Km2
Land cover type
Results Overview
Land Cover Changes 2000 - 2010 – Partial results
TOTAL AREAS 2000 Ha 2010 Ha % of changeAgriculture 7242066 7408341 2.3Rangeland 36518205 36517633 0.0
Trees 10601906 10464454 -1.3Forest Plantation 108461 98870 -8.8
Urban Areas 82710 89294 8.0Water 1463815 1440852 -1.6
N.B. Total areas calculated considering the main class in mixed classes
Planning (Land Use and Planning, Development Activities Planning)
Education
Research (Activities within Research Institutions and Universities)
Water (Water Conservation, Use and Control)
Agriculture (Soil and Land Conservation, Pest Control, Crop Monitoring)
Environment (Forestry, Biodiversity, Wildlife, Sensitive Areas, etc.)
Monitoring (Food Security, Early Warning)
Health (Disease control, health infrastructure, vaccination campaigns, etc.)
Other Application
Dataset Applications
Main fields of application:
Relative Volumes of Data Set Requests by Application
Planning18%
Education8%
Research21%
Water6%
Agriculture8%
Environment 17%
Monitoring5%
Health3%
Other14%
Database Request Statistics
% of requests per type of organization
International NGOs19%
Private and Commercial Organizations and
Individuals 12%
UN agencies and European Commission
19%
Universities30%
Governmental Organizations and
Governmental Research Institutes
20%
Total approved requests 2095
Kenya - Spatially Aggregated Multipurpose Landcover database (Africover) 372Kenya - Thematic Grassland Aggregation (Africover) 131
Kenya - Thematic Agriculture Aggregation (Africover) 216Kenya - Thematic Woody Aggregation (Africover) 142
Kenya - Thematic Aggregation Geomorphology / Lithology 104Kenya - Thematic Aggregation Geomorphology / Landform 113
Kenya - Boundaries, Towns, Roads, Rivers 1017
Total number of request for Kenya 2323 – pending 9 – rejected 219
Total number of delivered data for Kenya
DRSRS is involved in:◦ Clinton Climate
Initiatives on land cover mapping of Kenya
◦ KFS REDD Readness plan for MRV (Monitoring, Reporting and Verification on Forests)
◦ FAO/DRSRS Dryland forest mapping for REDD
PASCO/KFS/RCMRD/DRSRS
Other Initiatives
THE END