California Land Cover
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They are sorted by county. The smallest are under a meg while the largest - Fresno - is more than 400 megs. The average size is around 30 to 40 megs.
These would be a great addition to OSM since they contain valuable metadata. Or maybe the layers could be added individually. I.E. adding the FMMP farming data (see California_Farms) that is updated regularly.
Once the areas have been added, the state will take on a similar look to states like Georgia (Georgia (U.S. state)) and Massachusetts (MassGIS) that have had statewide imports done. Another good example of what California can be is the Corine Land Cover (WikiProject Corine Land Cover).
- It is a huge dataset and will need some optimization. The straight lines have points every five meters, creating jagged edges that aren't visually attractive. Josm has a plugin but that's probably not the best way. A spline interpolation would really improve it dramatically. It will increase data size, but it's worth it. Maybe there is a batch mode program available to do that. Mapshaper has a tool to optimize a shapefile by reducing the details in the file. It may not be working though. Here is a rough idea of what the areas look like without being simplified. Openjump http://www.openjump.org has plugins for DP filter and a plugin for spline interpolation.Spline interpolation works nicely but each lines is processed individually and this leaves gaps/overlaps between areas. Needs some investigations. other options for reducing points is GPSBabel which supports DP filter and osm format, or to process the whole data in postgis.
- Only vegetation data should be used. The urban/residential/water/unknown should be skipped since the quality isn't good enough for this purpose and would just create tons of conflicts with existing data. Also there is/will be better data available.
- We can use some filters to split the shapefiles into different features. This is also great to prepare the OSM files for each type instead having it mixed all together.
- All these polygons have overlapping ways. This should be avoided because it creates tones of duplicate nodes/ways. Each polygon should be split in single ways and the area defined with a relation. According to the description, mapshaper will do that to. There may be a way to do this with postgis or through a Perl script. Validator will just merge duplicate nodes, but can't fix duplicate lines. This is really a tricky thing that many other updates lack. Efficiency should be considered here. Also editing is easier then. This data shouldn't need much editing after import. This approach works only if uploads are done in large chunks because the uploader needs to keep track of server node/way/ id and map to local id in osm file.
possible tools for conversion supporting line sharing ogr2osm Also Ian Dees is working to support this in shp-to-osm
technically conversion and upload can be done by a small group but OSM is a community project and a large community is required to verify the data, filter broken data and fix data to make it really worth to import. different scenarios could be.
- all data is converted and uploaded. no existing tags will be used instead a namespace prefix added. individual mappers can edit these tags and remove the prefix to get it rendered on the map.
Pro: only verified data will appear on the map, upload can make use of relations more easy, no need for individual mappers to run conversion and upload scripts. any editor can be used to work on the data. data can be worked on shape by shape.
Con: each area needs inspection and edit. this will increase the version number in the DB for each edit. It will clutter editors without being useful before tags are changed.
- only scripts or converted files are provided and mappers decide which areas they work on and will upload.
Pro: only verified data is uploaded. osm is not polluted with data never used and fixed
Con: needs more planning to coordinate work and conflicts. data needs to be broken into smaller chunks to allow editing in JOSM or Merkatoor before upload. No support of Potlatch possible.
Here are some of the categories in the shapefiles and how they can be mapped in OSM. Here is the complete metadata. Shape file attributes need to be mapped to established OSM tags where applicable. If no OSM tag exists a new one can be proposed. established and rendered tags shouldn't be overloaded with new features. this will make the rendering ugly. instead rendering needs to be extended. Some features in the original shape files are too unspecific to include. Examples are the water/urban/unknown attributes. also barren/rock/snow is very vague and maybe excluded. farm land should be imported but needs to be carefully verified against existing data. county/state/tiger/trace from Yahoo landuse data is most likely better in quality. existing data for landuse=forest is widely wrong and this data should replace it. examples are national forests which are not forests but land managed by one agency and range from desert to managed forests to protected natural areas. Feel free to add additional ones if you know of any that would fit.
VEGTYPE DESCRIPTION COVERTYPE ------- ------------------- --------- NON-FOREST TYPES ---------------- SN Snow/Ice (natural=glacier) BAR AG Agriculture (landuse=farm) AGR DU Dune (natural=beach) BAR
These are based on whether the area is forested or not. So they would be landuse=forest or natural=wood. These could also have wood=*.
CONIFER FOREST/WOODLAND ---------------------- AA Noble Fir CON AB Santa Lucia Fir CON BP Bristlecone Pine CON BT Big Tree CON DF Pacific Douglas-Fir CON DG Douglas-Fir - Grand Fir CON DM Bigcone Douglas-Fir CON DP Douglas-Fir - Pine CON DW Douglas-Fir - White Fir CON EA Engelmann Spruce CON EP Eastside Pine CON FP Foxtail Pine CON GF Grand Fir CON JC California Juniper CON JU Utah Juniper CON JP Jeffrey Pine CON KP Knobcone Pine CON LP Lodgepole Pine CON MA Alaska Yellow-Cedar CON MB Mixed Conifer - Giant Sequoia CON MC Cuyamaca Cypress CON MD Incense-Cedar CON MF Mixed Conifer - Fir CON MG Gowen Cypress CON MH Mountain Hemlock CON MI Piute Cypress CON MK Klamath Mixed Conifer CON MM Monterey Cypress CON MN McNab Cypress CON MO Baker Cypress CON MP Mixed Conifer - Pine CON MS Sargent Cypress CON MT Tecate Cypress CON MU Ultramafic Mixed Conifer CON MY Pygmy Cypress CON MZ Santa Cruz Cypress CON PB Brewer Spruce CON PC Coulter Pine CON PD Gray Pine CON PJ Singleleaf Pinyon Pine CON PL Limber Pine CON PM Bishop Pine CON PO Port Orford Cedar CON PP Ponderosa Pine CON PQ Fourneedle Pinyon Pine CON PR Monterey Pine CON PS Shore Pine CON PT Torrey Pine CON PW Ponderosa Pine - White Fir CON RD Redwood - Douglas-Fir CON RF Red Fir CON RW Redwood CON SA Subalpine Conifers CON SG Sitka Spruce - Grand Fir CON SK Sitka Spruce CON SR Sitka Spruce - Redwood CON WB Whitebark Pine CON WF Whte Fir CON WH Western Hemlock CON WJ Western Juniper CON WP Washoe Pine CON WW Western White Pine CON XC Unknown Conifer CON IC Non-native/Ornamental Conifer CON HARDWOOD FOREST/WOODLAND ------------------------ ET Elephant Tree HDW FM Curlleaf Mountain Mahogany HDW FO Water Birch Alliance HDW NR Mixed Riparian Hardwoods HDW NX Mixed Hardwoods HDW Q1 Live Oak - Madrone HDW QA Coast Live Oak HDW QB California Bay HDW QC Canyon Live Oak HDW QD Blue Oak HDW QE White Alder HDW QF Fremont Cottonwood HDW QG Oregon White Oak HDW QH Madrone (Black Oak) HDW QI California Buckeye HDW QJ Cottonwood - Alder HDW QK California Black Oak HDW QL Valley Oak HDW QM Bigleaf Maple (Dogwood) HDW QN Engelmann Oak HDW QO Willow HDW QP California Sycamore HDW QQ Quaking Aspen HDW QR Red Alder HDW QS Willow - Aspen HDW QT Tanoak (Madrone) HDW QV Black Walnut HDW QW Interior Live Oak HDW QX Black Cottonwood HDW QY Willow - Alder HDW QZ Eucalyptus HDW TC Tree Chinquapin HDW TX Montane Mixed Hardwood HDW UD Desert Willow HDW UI Desert Ironwood HDW UJ Joshua Tree HDW UL Catclaw Acacia HDW UM Mesquite HDW UP Palo Verde HDW UT Tamarisk HDW UW Fan Palm HDW UX Smoke Tree - Desert Willow HDW WD Dogwood HDW EX Coastal Mixed Hardwood HDW XH Unknown Hardwood HDW IH Non-native Hardwood HDW IM Non-native/Ornamental CON/HDW MIX SHRUB TYPES ----------- natural=scrub for these AD White Bursage SHB AC Cushion Plant SHB AX Mixed Alpine Scrub SHB AN Mendocino Manzanita SHB BB Bitterbrush SHB BC Saltbush SHB BG Black Greasewood SHB BI Littleleaf Mountain Mahogany SHB BL Low Sagebrush SHB BM Curlleaf Mountain Mahogany SHB BR Rabbitbrush SHB BS Basin Sagebrush SHB BX High Desert Mixed Shrub SHB BQ Basin Mixed Scrub SHB BZ Basin Transition (Desert) Scrub SHB C1 Ultramafic Mixed Shrub SHB CA Chamise SHB CB Salal-Calif. Huckleberry Shrub SHB CC Foothill Mixed Chaparral SHB CD Southern Mixed Chaparral SHB CG Greenleaf Manzanita SHB CH Huckleberry SHB CI Deerbrush SHB CJ Brewer Oak SHB CK Coyote Brush SHB CL Wedgeleaf Ceanothus SHB CM Upper Montane Mixed Shrub SHB CN Pinemat Manzanita SHB CP Bush Chinquapin Alliance SHB CQ Northern Mixed Chaparral SHB CR Red Shanks Charparral SHB CS Scrub Oak SHB CT Tucker Scrub Oak SHB CV Snowbrush SHB CW Whiteleaf Manzanita SHB CX Montane Mixed Chaparral SHB CY Mountain Whitethorn Alliance SHB CZ Semi Desert Chaparral SHB DA Blackbush SHB DB Desert Buckwheat SHB DC Cholla SHB DD Croton SHB DE Arrowweed SHB DI Indigo Bush SHB DO Ocotillo SHB DL Creosote SHB DS Shadscale SHB DV Mixed Desert Succulent SHB DX Mixed Desert Shrub SHB FD Ephedra (Mormon/Desert Tea) SHB HS Cheesebush SHB JC California Juniper SHB LS Scalebroom SHB ML Baccharis (riparian) SHB NA Mixed Alkaline Scrub SHB NB Mixed Desert Wash Scrub SHB NC North Coastal Mixed Shrub SHB NQ Mixed High Desert Scrub SHB RS Alluvial Fan Sage Scrub SHB SB Buckwheat (White Sage) SHB SC Blueblossom Ceanothus SHB SD Manzanita Chaparral SHB SE Encelia Scrub SHB SH Coastal Bluff Scrub SHB SI Bladderpod SHB SL Coastal Lupine SHB SM Sumac Shrub SHB SO Coastal Cactus SHB SP Sage SHB SQ Soft Scrub-Chaparral SHB SS California Sagebrush SHB SY Chaparral Yucca SHB TA Mountain Alder SHB TB Bitterbrush-Sagebrush Alliance SHB TM Cotton-thorn SHB TN Black Sagebrush Alliance SHB TS Snowberry Alliance SHB TT Big Basin Sagebrush Alliance SHB TV Mountain Sagebrush Alliance SHB WL Willow (riparian scrub) SHB WM Birchleaf Mountain Mahogany SHB XS Unknown Shrub SHB IS Non-native Shrub SHB X1 Unknown Urban/Non-native Veg. NNA WET HERBACEOUS TYPES -------------------- landuse=grassland or landuse=meadow for these HC Pickleweed - Cord Grass HEB HJ Wet Meadows (Grass/Sedge/Rush) HEB HT Tule - Cattail - Sedge HEB XJ Unknown Grass/Herbs HEB DRY HERBACEOUS TYPES -------------------- landuse=grassland or landuse=meadow for these, possibly natural=heath AC Alpine Grass/Forbs HEB HG Annual Grass/Forbs HEB HM Perennial Grass HEB XG Unknown Grass/Herbs HEB IA Giant Reed/Pampas Grass HEB IG Non-native/Ornamental Grass HEB
In addition to the COVERTYPE field, there is also a WHRTYPE field which is an additional modifier. Sometimes it will be similar, but sometimes it will be different. They will probably be the same as the main land type so they probably wouldn't need to have tags when converted unless they provide addition information.
WHRTYPE DESCRIPTION ------- ---------------------------------- ADS ALPINE DWARF SHRUB (natural,scrub) AGR AGRICULTURE (landuse=farm) AGS ANNUAL GRASS (landuse,grassland) ASC ALKALI SCRUB (natural,scrub) ASP ASPEN BAR BARREN BBR BITTERBRUSH (natural,scrub) BOP BLUE OAK FOOTHILL PINE BOW BLUE OAK WOODLAND CHP UNKNOWN SHRUB TYPE (natural,scrub) CON UNKNOWN CONIFER TYPE COW COASTAL OAK WOODLAND CPC CLOSED CONE PINE-CYPRESS CRC CHAMISE-REDSHANK CHAPARRAL CRP AGRICULTURE-CROPS (landuse=farm) CSC COASTAL SCRUB (natural,scrub) DFR DOUGLAS FIR DRI DESERT RIPARIAN DRY DRY LAKE BED DSC DESERT SCRUB (natural,scrub) DSS DESERT SUCCULENT SCRUB (natural,scrub) DSW DESERT WASH EPN EASTSIDE PINE EUC EUCALYPTUS EST ESTUARINE FEW FRESHWATER EMERGENT WETLAND (wetland=marsh,natural,wetland) FWT FORESTED WETLAND (wetland=marsh,natural,wetland) GRS UNKNOWN GRASS TYPE (landuse,grassland) JPN JEFFREY PINE JST JOSHUA TREE JUN JUNIPER KMC KLAMATH MIXED CONIFER LAC LACUSTRINE LPN LODGEPOLE PINE LSG LOW SAGEBRUSH (natural,scrub) MAR MARINE MCH MIXED CHAPARRAL (natural,scrub) MCN MIXED CONIFER MCP MONTANE CHAPARRAL (natural,scrub) MHC MONTANE HARDWOODS CONIFER MHW MONTANE HARDWOOD MRI MONTANE RIPARIAN NWT NONFORESTED WETLAND (wetland=marsh,natural,wetland) OVN AGRICULTURE-ORCHARD-VINYARD (landuse=farm) PGS PERENNIAL GRASS (landuse,grassland) PJN PINYON-JUNIPER POS PALM OASIS PPN PONDEROSA PINE RDW REDWOOD RFR RED FIR RIV RIVERINE ROG REDWOOD OLDGROWTH RYG REDWOOD SECONDGROWTH SCN SUBALPINE CONIFER SEW SALINE EMERGENT WETLAND (landuse,salt_pond) SGB SAGEBRUSH (natural,scrub) SMC SIERRAN MIXED CONIFER UAG URBAN-AGRICULTURE (landuse=farm) VFH VALLEY FOOTHILL HARDWOOD VOW VALLEY OAK WOODLAND VRI VALLEY FOOTHIL RIPARIAN WFR WHITE FIR WTM WET MEADOW XXX BARREN/ROCK/OTHER
The main advantage of this data over FRAP's is that this one is smoother and doesn't have the jagged edges.
Here is a possible set of rules to be used with shp-to-osm to convert it.
outer,WHR1,,source,caltrans outer,LANDCOV_ID,,landcover_ID,- outer,REGION,CAS,region,Cascade Ranges outer,REGION,CW,region,Central Western California outer,REGION,ESN,region,East of the Sierra Nevada outer,REGION,GV,region,Great Central Valley outer,REGION,MOD,region,Modoc Plateau outer,REGION,MOJ,region,Mojave Desert outer,REGION,NW,region,Northwestern California outer,REGION,SN,region,Sierra Nevada outer,REGION,SON,region,Sonoran Desert outer,REGION,SW,region,Southwestern California #description for these,dominant species outer,SP1A,22105,landuse,farm outer,SP1A,22105,crop,rice outer,SP1A,22106,landuse,meadow outer,SP1A,22200,landuse,farm outer,SP1A,22200,description,orchards, vineyards, nurseries outer,SP1A,22200,note,what agricultural use is this? outer,SP1A,22201,landuse,orchard outer,SP1A,22201,description,evergreen orchard outer,SP1A,22202,landuse,orchard outer,SP1A,22202,description,deciduous orchard outer,SP1A,22203,landuse,vineyard outer,SP1A,22700,landuse,nature_reserve outer,SP1A,22600,description,reclaimed lakebed/waterfowl mgmt/ag. outer,SP1A,42915,natural,wood outer,SP1A,42915,description,mid-elevation plantations (most likely Ponderosa pine) outer,SP1A,42951,natural,wood outer,SP1A,42951,description,upper-elevation plantations (most likely Red fir) outer,SP1A,77100,natural,salt_flat outer,SP1A,77200,natural,sand outer,SP1A,77300,natural,sand outer,SP1A,77400,natural,rock outer,SP1A,77400,description,bare exposed rock outer,SP1A,77401,natural,lava outer,SP1A,77401,description,bare exposed lava outer,SP1A,77401,natural,lava outer,SP1A,77500,landuse,quarry outer,SP1A,77600,natural,fell outer,SP1A,77600,description,transitional bare areas outer,SP1A,77700,natural,fell outer,SP1A,77700,description,mixed barren land outer,SP1A,77701,natural,rock outer,SP1A,77701,description,Badlands outer,SP1A,78000,natural,mud outer,SP1A,99100,natural,glacier outer,SP1A,99100,description,perennial snowfields outer,SP1A,99200,natural,glacier #whr1 uses notes, these ones not defined in SP1A outer,WHR1,ADS,natural,scrub outer,WHR1,AGS,landuse,meadow outer,WHR1,ASC,natural,heath outer,WHR1,ASC,note,alkali desert scrub outer,WHR1,ASP,natural,wood outer,WHR1,ASP,wood,aspen outer,WHR1,BAR,natural,fell outer,WHR1,BBR,natural,scrub outer,WHR1,BBR,natural,scrub outer,WHR1,BOP,natural,wood outer,WHR1,BOP,wood,pine outer,WHR1,BOW,natural,wood outer,WHR1,BOW,wood,oak outer,WHR1,COW,natural,wood outer,WHR1,COW,wood,oak outer,WHR1,CPC,natural,wood outer,WHR1,CPC,wood,pine,cypress outer,WHR1,CRC,natural,scrub outer,WHR1,CRC,note,chamise-redshank chaparral outer,WHR1,CSC,natural,scrub outer,WHR1,DFR,natural,wood outer,WHR1,DRF,wood,fir outer,WHR1,DRI,natural,heath outer,WHR1,DRI,note,desert riparian outer,WHR1,DGR,landuse,farm outer,WHR1,DOR,landuse,orchard outer,WHR1,DSC,natural,heath outer,WHR1,DSC,note,desert scrub outer,WHR1,DSS,natural,scrub outer,WHR1,DSW,natural,heath outer,WHR1,DSW,note,desert wash outer,WHR1,EOR,landuse,orchard outer,WHR1,EPN,natural,wood outer,WHR1,EPN,wood,pine outer,WHR1,EUC,natural,wood outer,WHR1,EUC,wood,eucalyptus outer,WHR1,IGR,landuse,farm outer,WHR1,IRF,landuse,farm outer,WHR1,IRH,landuse,farm outer,WHR1,JPN,natural,wood outer,WHR1,JPN,wood,pine outer,WHR1,JST,natural,heath outer,WHR1,JUN,natural,wood outer,WHR1,JUN,wood,juniper outer,WHR1,KMC,natural,wood outer,WHR1,KMC,wood,conifer outer,WHR1,LPN,natural,wood outer,WHR1,LPN,wood,pine outer,WHR1,LSG,natural,scrub outer,WHR1,MCH,natural,scrub outer,WHR1,MCH,note,mixed chaparral outer,WHR1,MCP,natural,scrub outer,WHR1,MHC,natural,wood outer,WHR1,MHC,wood,chaparral outer,WHR1,MHW,natural,wood outer,WHR1,MRI,natural,wood outer,WHR1,OVN,landuse,orchard outer,WHR1,PAS,landuse,meadow outer,WHR1,PGS,landuse,meadow outer,WHR1,PJN,natural,wood outer,WHR1,PJN,note,pinyon-juniper outer,WHR1,PJN,wood,pinyon-juniper outer,WHR1,POS,natural,wood outer,WHR1,POS,wood,palm outer,WHR1,PPN,natural,wood outer,WHR1,PPN,wood,pine outer,WHR1,RDW,natural,wood outer,WHR1,RDW,wood,redwood outer,WHR1,RFR,natural,wood outer,WHR1,RFR,wood,fir outer,WHR1,SCN,natural,wood outer,WHR1,SCN,note,subalpine conifer outer,WHR1,SGB,natural,scrub outer,WHR1,SGB,note,sagebrush outer,WHR1,SMC,natural,wood outer,WHR1,SMC,wood,conifer outer,WHR1,VIN,landuse,vineyard outer,WHR1,VOW,natural,wood outer,WHR1,VOW,wood,oak outer,WHR1,VRI,natural,wood outer,WHR1,WFR,natural,wood outer,WHR1,WTM,natural,wetland outer,WHR1,ADS,habitat_primary,alpine-dwarf shrub outer,WHR1,AGS,habitat_primary,grassland outer,WHR1,ASC,habitat_primary,alkali desert scrub outer,WHR1,ASP,habitat_primary,aspen outer,WHR1,BAR,habitat_primary,barren outer,WHR1,BBR,habitat_primary,bitterbrush outer,WHR1,BOP,habitat_primary,blue oak-foothill pine outer,WHR1,BOW,habitat_primary,blue oak woodland outer,WHR1,COW,habitat_primary,coastal oak woodland outer,WHR1,CPC,habitat_primary,closed-cone pine-cypress outer,WHR1,CRC,habitat_primary,chamise-redshank chaparral outer,WHR1,CSC,habitat_primary,coastal scrub outer,WHR1,DFR,habitat_primary,douglas-fir outer,WHR1,DGR,habitat_primary,dryland grain crops outer,WHR1,DOR,habitat_pri