[mapserver-users] fetching netcdf from web service

Rob Fuller fullergalway at gmail.com
Fri Dec 15 07:40:23 PST 2017


Hi,

I was hoping to expose some ocean data as WMS using mapserver, where the
netcdf data is fetched on demand from the erddap server.

The gdalinfo command appears to show something useful, however the
corresponding ogrinfo command doesn't, and neither have I been able to come
up with a mapfile to see any kind of data fetched from erddap and rendered.

Has anyone done this or can you offer any tips?

Thanks,
Rob.

root at 0031582b6672:/geodata# gdalinfo "
http://erddap.digitalocean.ie/erddap/griddap/IMI_CONN_2D.nc?zeta[(last)][(52.9508945):(53.7291217)][(-10.7985117):(-8.8964883)]&.nc
"
Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute
Driver: netCDF/Network Common Data Format
Files: none associated
Size is 640, 440
Coordinate System is `'
Origin = (-10.799999999999960,53.730008086083473)
Pixel Size = (0.002976562500000,-0.001772727222680)
Metadata:
  latitude#actual_range={52.95089447171561,53.72912172247213}
  latitude#axis=Y
  latitude#ioos_category=Location
  latitude#long_name=Latitude
  latitude#standard_name=latitude
  latitude#units=degrees_north
  latitude#_CoordinateAxisType=Lat
  longitude#actual_range={-10.79851171874996,-8.89648828124996}
  longitude#axis=X
  longitude#ioos_category=Location
  longitude#long_name=Longitude
  longitude#standard_name=longitude
  longitude#units=degrees_east
  longitude#_CoordinateAxisType=Lon
  NC_GLOBAL#cdm_data_type=Grid
  NC_GLOBAL#Easternmost_Easting=-8.89648828124996
  NC_GLOBAL#geospatial_lat_max=53.72912172247213
  NC_GLOBAL#geospatial_lat_min=52.95089447171561
  NC_GLOBAL#geospatial_lat_resolution=0.001772727222680005
  NC_GLOBAL#geospatial_lat_units=degrees_north
  NC_GLOBAL#geospatial_lon_max=-8.89648828124996
  NC_GLOBAL#geospatial_lon_min=-10.79851171874996
  NC_GLOBAL#geospatial_lon_resolution=0.002976562500000001
  NC_GLOBAL#geospatial_lon_units=degrees_east
  NC_GLOBAL#history=2017-12-15T15:33:03Z
http://milas.marine.ie/thredds/dodsC/IMI-CONN_AGG
2017-12-15T15:33:03Z
http://erddap.digitalocean.ie/erddap/griddap/IMI_CONN_2D.nc?zeta[(last)][(52.9508945):(53.7291217)][(-10.7985117):(-8.8964883)]&.nc
  NC_GLOBAL#infoUrl=http://milas.marine.ie/thredds/
  NC_GLOBAL#institution=Irish Marine Institute
  NC_GLOBAL#license=The data may be used and redistributed for free but is
not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
  NC_GLOBAL#Northernmost_Northing=53.72912172247213
  NC_GLOBAL#sourceUrl=http://milas.marine.ie/thredds/dodsC/IMI-CONN_AGG
  NC_GLOBAL#Southernmost_Northing=52.95089447171561
  NC_GLOBAL#summary=CONN2D
  NC_GLOBAL#time_coverage_end=2017-12-18T00:00:00Z
  NC_GLOBAL#time_coverage_start=2017-12-18T00:00:00Z
  NC_GLOBAL#title=Irish Marine Institute Connemara Model CONN2D
  NC_GLOBAL#Westernmost_Easting=-10.79851171874996
  NETCDF_DIM_EXTRA={time}
  NETCDF_DIM_time_DEF={1,6}
  NETCDF_DIM_time_VALUES=1513555200
  time#actual_range={1513555200,1513555200}
  time#axis=T
  time#ioos_category=Time
  time#long_name=time since initialization
  time#standard_name=time
  time#time_origin=01-JAN-1970 00:00:00
  time#units=seconds since 1970-01-01T00:00:00Z
  time#_CoordinateAxisType=Time
  zeta#colorBarMaximum=3.0
  zeta#colorBarMinimum=-3.0
  zeta#coordinates=time latitude longitude
  zeta#FillValue_=9.99999993381581e+36
  zeta#ioos_category=Sea Level
  zeta#long_name=Sealevel Height
  zeta#missing_value=9.9999999e+36
  zeta#standard_name=sea_surface_height
  zeta#units=m
Subdatasets:
  SUBDATASET_1_NAME=NETCDF:"/tmp/file.dat":zeta
  SUBDATASET_1_DESC=[1x440x640] sea_surface_height (32-bit floating-point)
Geolocation:
  LINE_OFFSET=0
  LINE_STEP=1
  PIXEL_OFFSET=0
  PIXEL_STEP=1
  SRS=GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS
84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]
  X_BAND=1
  X_DATASET=NETCDF:"/tmp/file.dat":longitude
  Y_BAND=1
  Y_DATASET=NETCDF:"/tmp/file.dat":latitude
Corner Coordinates:
Upper Left  ( -10.8000000,  53.7300081)
Lower Left  ( -10.8000000,  52.9500081)
Upper Right (  -8.8950000,  53.7300081)
Lower Right (  -8.8950000,  52.9500081)
Center      (  -9.8475000,  53.3400081)
Band 1 Block=640x1 Type=Float32, ColorInterp=Undefined
  NoData Value=9.99999993381581251e+36
  Unit Type: m
  Metadata:
    colorBarMaximum=3.0
    colorBarMinimum=-3.0
    coordinates=time latitude longitude
    FillValue_=9.99999993381581e+36
    ioos_category=Sea Level
    long_name=Sealevel Height
    missing_value=9.9999999e+36
    NETCDF_DIM_time=1513555200
    NETCDF_VARNAME=zeta
    standard_name=sea_surface_height
    units=m

root at 0031582b6672:/geodata# ogrinfo "
http://erddap.digitalocean.ie/erddap/griddap/IMI_CONN_2D.nc?zeta[(last)][(52.9508945):(53.7291217)][(-10.7985117):(-8.8964883)]&.nc
"
ERROR 6: Update from remote service not supported
Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute
FAILURE:
Unable to open datasource `
http://erddap.digitalocean.ie/erddap/griddap/IMI_CONN_2D.nc?zeta[(last)][(52.9508945):(53.7291217)][(-10.7985117):(-8.8964883)]&.nc'
with the following drivers.
  -> PCIDSK
  -> netCDF
  -> JPEG2000
  -> PDF
  -> ESRI Shapefile
  -> MapInfo File
  -> UK .NTF
  -> OGR_SDTS
  -> S57
  -> DGN
  -> OGR_VRT
  -> REC
  -> Memory
  -> BNA
  -> CSV
  -> NAS
  -> GML
  -> GPX
  -> LIBKML
  -> KML
  -> GeoJSON
  -> Interlis 1
  -> Interlis 2
  -> OGR_GMT
  -> GPKG
  -> SQLite
  -> ODBC
  -> WAsP
  -> MDB
  -> PGeo
  -> MSSQLSpatial
  -> PostgreSQL
  -> MySQL
  -> OpenFileGDB
  -> XPlane
  -> DXF
  -> CAD
  -> Geoconcept
  -> GeoRSS
  -> GPSTrackMaker
  -> VFK
  -> PGDUMP
  -> OSM
  -> GPSBabel
  -> SUA
  -> OpenAir
  -> OGR_PDS
  -> WFS
  -> HTF
  -> AeronavFAA
  -> Geomedia
  -> EDIGEO
  -> GFT
  -> SVG
  -> CouchDB
  -> Cloudant
  -> Idrisi
  -> ARCGEN
  -> SEGUKOOA
  -> SEGY
  -> XLS
  -> ODS
  -> XLSX
  -> ElasticSearch
  -> Walk
  -> Carto
  -> AmigoCloud
  -> SXF
  -> Selafin
  -> JML
  -> PLSCENES
  -> CSW
  -> VDV
  -> GMLAS
  -> TIGER
  -> AVCBin
  -> AVCE00
  -> HTTP
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