CLC06+UA Canary Islands vegetation
This is part of CLC06+UA Canary Islands import process.
Present situation
There are 26 ways with tag landuse=forest in Tenerife, 2 in La Palma and 8 in Gran Canaria (Jan 9, 2011). There are 0 in the other islands.
Target
Recently, there have been an initiative to import Corine vegetation layers (Four Corine layers Spain 2011) in to Spain. Canary Islands was excluded initially due to dense present mapping, nevertheless only in one island the vegetation is well mapped nowadays. This import could be a good adding to the map and a improvement of it.
Approach
These are the planned stages.
| Stage | Description | Status | Notes | Who's involved (feel free to volunteer to any stage) |
|---|---|---|---|---|
| 1 | Comunity discussion | Started at Feb 1, 2011 | See Talk-es for details | javiersanp |
| 2 | Data preparation | Completed | Download shapefiles, select Canary Islands features, reproject, combine UA with CLC. | javiersanp |
| 3 | Publishing | Completed | Publish results with Mapserver | javiersanp |
| 4 | Analisis | Completed | Check data with other sources and OSM. Manual replace / improve / preserve existing ways. | javiersanp |
| 5 | Conversion | Completed | Export to osm and tagging with Ogr2osm | javiersanp |
| 6 | Refine | Completed | Validate and delete duplicate nodes with JOSM. Split ways to less than 2000 nodes chunks. | javiersanp |
| 7 | Import | Completed | Upload to OSM. | javiersanp |
Sources
These are the layers used:
From Corine Land Cover 2006 version 13
- clc06_c311.shp - Broad-leaved forest
- clc06_c312.shp - Coniferous forest
- clc06_c322.shp - Transitional woodland-shrub
- clc06_c324.shp - Moors and heathland
- Layers 313 and 321 don't have any feature in Canary Islands.
- Layer 323 could be included soon.
From GMES Urban Atlas
- es008l_las_palmas.shp
- es025l_santa_cruz_de_tenerife.shp
Data preparation
These shapefiles are generated using Ogr2ogr and reproyected to EPSG:4326:
- clc311.shp = Selection of Corine features in Canary Islands
- clc312.shp = Idem
- clc322.shp = Idem
- clc324.shp = Idem
- ua.shp = es008l_las_palmas.shp union es025l_santa_cruz_de_tenerife.shp
- ua20000.shp = Selection of 2-Agricultural areas, semi-natural areas and wetlands layer from ua.shp
- ua30000.shp = Selection of 3-Forest layer from ua.shp
- nature.shp = From Geofabrik Canary Islands Feb 7, 2011
These other are generated with QGIS from the previous.
| Layer | Source | Tags | Features (1,2) | |
|---|---|---|---|---|
| 1 | clc311_menos_UA.shp | clc311.shp - UA.shp | natural=wood, trees=broad-leaved, source=CLC06 | 15 |
| 2 | clc312_menos_UA.shp | clc312.shp - UA.shp | natural=wood, trees=coniferous, wood=coniferous, source=CLC06 | 60 |
| 3 | clc322_menos_UA.shp | clc322.shp - UA.shp | natural=heath, source=CLC06 | 34 |
| 4 | clc324_menos_UA.shp | clc324.shp - UA.shp | natural=wood, wood=mixed, source=CLC06 | 6 |
| 5 | ua30000_menos_clc311-312-322-324.shp | ua30000.shp - clc311.shp - clc312.shp - clc322.shp - clc324.shp. | natural=wood, source=GMES UA | 91 |
| 6 | clc311_y_ua30000.shp | clc311.shp intersection ua30000.shp. | natural=wood, trees=broad-leaved, source=CLC06; GMES UA | 26 |
| 7 | clc312_y_ua30000.shp | clc312.shp intersection ua30000.shp. | natural=wood, trees=coniferous, wood=coniferous, source=CLC06; GMES UA | 87 |
| 8 | clc312_y_ua20000.shp | clc312.shp intersection ua20000.shp. | natural=wood, trees=coniferous, wood=coniferous, source=CLC06; GMES UA | 436 |
| 9 | clc322_y_ua30000.shp | clc322.shp intersection ua30000.shp. | natural=heath, source=CLC06; GMES UA | 35 |
| 10 | clc324_y_ua30000.shp | clc324.shp intersection ua30000.shp. | natural=wood, wood=mixed, source=CLC06; GMES UA | 1 |
- (1) ua30000.shp and ua20000.shp was processed to merge U.A. 122 Roads in order to get continuous polygons.
- 1-4 are vegetation present in Corine but not in Urban Atlas.
- 5 vegetation present in Urban Atlas but not in Corine.
- 6-10 are vegetation present in Urban Atlas and Corine. Corine allows a better categorization of the UA data.
- (2) 5-10 smallest orphands resulting from previuos process was merged with adjacent parents.
- TO DO: Check using also CLC 323 layer.
Tagging
It have been adopted the WikiProject Corine Land Cover/Tagging scheme, ussing natural=wood instead of landuse=forest because in Canary Islands there are not managed maintained or industrial used forest. This is the schema used in the actual mapping. Tag wood=deciduous is avoided because Canary Islands forest are mainly perennial. Commons tags:
In Corine:
- source = 'CLC06'
- source:name = 'Corine Land Cover 2006 version 13'
- source:ref = 'http://www.eea.europa.eu/data-and-maps/data/clc-2006-vector-data-version'
- Plus CLC:code_06, CLC:ID and CLC:remark (if not null)
In Urban Atlas:
- source = GMES UA
- source:name = GMES Urban Atlas
- source:ref = http://www.eea.europa.eu/data-and-maps/data/urban-atlas%7CGMES
- Plus UA:code, UA:item and UA:prod_date
Publishing
You can previsualize the results with this home made WMS.
- URL: http://javiersanp.com/cgi-bin/mapserv?MAP=/home/javier/corineimport/clcimport.map
- Capacities: http://javiersanp.com/cgi-bin/mapserv?MAP=/home/javier/corineimport/clcimport.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities
- MAP: http://javiersanp.com/cgi-bin/mapserv?MAP=/home/javier/corineimport/clcimport.map&LAYERS=ALL&MODE=MAP
- Legend: http://javiersanp.com/cgi-bin/mapserv?MAP=/home/javier/corineimport/clcimport.map&LAYERS=ALL&MODE=LEGEND
Analisis
The WMS shows OSM data with landuse=forest as a transparent red layer. Results could be overlapped with Ortofotos de Grafcan or other sources. Corine data into UA area are discarded because the second is more recent and with better spatial resolution.Neverthless they are used to distinguish vegetations types. Some features from layer clc312_y_ua20000.shp was used because they fit better with present forest areas showed in OrtoExpress than with agricultural areas.
Imported data is compared with OSM forest/wood areas (from Geofabrik natural.shp) and conflicting landuse areas (residential, industrial, etc.) extracted with Osmosis from Geofabrik canary_islands.osm (unfortunately this metod don't include relations). This is a list of afected ways:
| Way | Island | Tags | State | Notes |
|---|---|---|---|---|
| 90017308, 91761032 | La Palma | landuse=forest | Replace | Corine fits better with OrtoExpress |
| 33291325 | La Palma | landuse=residential | Edit | Refine border |
| 61752151 | Gran Canaria | landuse=forest | Keep | Not present in UA/CLC |
| 69872556 | Gran Canaria | natural=wood | Keep | Not present in UA/CLC |
| 69874067 | Gran Canaria | natural=wood | Replace | Improve tagging and OrtoExpress fitting |
| 69884628 | Gran Canaria | natural=wood | Replace | Part of a bigger polygon |
| 70122344 | Gran Canaria | landuse=forest | Keep | Not present in UA/CLC |
| 70122345 | Gran Canaria | landuse=forest | Replace | Part of a bigger polygon |
| 70122346 | Gran Canaria | tourism=camp_site | Replace | Part of a bigger polygon |
| 70122348 | Gran Canaria | landuse=forest | Replace | Improve tagging |
| 69902752, 42369619 | Gran Canaria | landuse=residential | Edit | Improve fit to OrtoExpress |
| 27775231, 28010861, 28516938, 28522623, 28522658, 28522803, 28522825, 28607544, 28607586, 28607617, 28607694, 28607751, 34653070, 34881026, 34905715, 34941873, 34941903, 34990786, 36865530, 36865531, 60659745, 77417537, 94972821 | Tenerife | natural = wood | Replace | |
| 28700484, 87925769 | Tenerife | landuse=forest | Edit | |
| 95402597 | Tenerife | natural = wood | Keep | |
| 34905948, 34905903 | Tenerife | natural=fell | Replace | |
| 85423445 | Tenerife | natural=lava | Edit | |
| 34990807 | Tenerife | landuse=farmland | Edit | |
| 83459419 | Tenerife | leisure = golf_course | Edit |
Conversion
Ogr2osm translation file for non capital islands (Corine only): clc_veg.py and capital islands (Corine and Urban Atlas): clc_ua_veg.py.
Import
| Island | Relations | Ways | Nodes | Status |
|---|---|---|---|---|
| La Palma | 14 | 72 | 15541 | Changesets 7290967, 7291293 and 7294708 |
| La Gomera | 14 | 65 | 6389 | Changesets 7269037, 7280728 and 7285296 |
| El Hierro | 3 | 22 | 4793 | Changesets 7266907, 7279531 and 7282002 |
| Fuerteventura | 0 | 3 | 252 | Changeset 7260090 |
| Lanzarote | 0 | 1 | 121 | Changeset 7260090 |
| Gran Canaria | 21 | 166 | 29615 | Changesets 7425405, 7425053, 7424685, 7423376 and 7422991 |
| Tenerife | 33 | 333 | 27703 | Changesets 7459404, 7458027, 7451092, 7442540, 7442505, 7442448, 7442313, 7442232 and 7442164 |
| Total | 85 | 662 | 84414 |