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GEOG585: Internet Mapping: Lab 7

Question 1

The GetCapabilities request for the USGS Framework Data Layers WFS service is:

http://frameworkwfs.usgs.gov/framework/wfs/wfs.cgi?DATASTORE=Framework&SERVICE=WFS&VERSION=1.1.0&REQUEST=GetCapabilities

Answer the following questions based upon information provided by the XML document provided by this request.

  1. What is the Title of the service?  USGS Framework Layer WFS
  2. How is the service described by the abstract for the service? A WFS serving USGS framework layers.
  3. If you have questions about how to access the service, whom should you contact? Peter Vretanos
  4. From the information contained in the <ows:Operation name="DescribeFeatureType"> section of the metadata
    4.1. What are the values of the “TypeName” parameter that correspond with the various data elements available from the service?  gubs:GovernmentalUnit(CE, MCD, RE, ST) and hyd:HydroElement(ARHI, ARMD, FLHI, FLMD, LIHI, LIMD, PTHI, PTMD, WBHI, WBMD)
    4.2. What “outputFormat” values are supported by the service for the delivery of feature type descriptions?  text/xml; subtype=gml/3.1.1, text/xml; subtype=gml/3.1.1/profiles/gmlsf/0, text/xml; subtype=gml/3.1.1/profiles/gmlsf/1, text/xml; subtype=gml/2.1.2, application/gml+xml; subtype=gml/3.1.1,application/gml+xml; subtype=gml/3.1.1/profiles/gmlsf/0,application/gml+xml; subtype=gml/3.1.1/profiles/gmlsf/1,application/gml+xml; subtype=gml/2.1.2,text/xml; subtype=bxfs/0.0.3,BXFS,GML0,XMLSCHEMA,GML2,GML3,GML3L0,GML3L1,SXSDL
  5. From the information contained in the <ows:Operation name="GetFeature"> section of the metadata, what “outputFormat” values are supported by the service for the delivery of feature data?  text/xml; subtype=gml/3.1.1, text/xml; subtype=gml/3.1.1/profiles/gmlsf/0, text/xml; subtype=gml/3.1.1/profiles/gmlsf/1, text/xml; subtype=gml/2.1.2, application/gml+xml; subtype=gml/3.1.1, application/gml+xml; subtype=gml/3.1.1/profiles/gmlsf/0, application/gml+xml; subtype=gml/3.1.1/profiles/gmlsf/1, application/gml+xml; subtype=gml/2.1.2, x-application/gml:3, x-application/gml:3:0, x-application/gml:3:1, x-application/gml:2, text/xml; subtype="bxfs/0.0.3", GML0, GML1, GML.1, GML2, GML3, GML3L0, GML3L1, BXFS, RSS, application/rss+xml, KML, application/vnd.google-earth.kml+xml, ATOM, application/atom+xml, JSON, SHAPE, MIF
  6. From the <FeatureTypeList> element, answer the following questions about the <FeatureType> named “gubs:GovernmentalUnitST”
    6.1. What is the title of this <FeatureType>? Government Unit (State or Territory)
    6.2. What is the default spatial reference system for this <FeatureType>? EPSG:4269
    6.3. What is the bounding box of this <FeatureType>?  -179.14221197 18.9108417 -66.94983061 71.35256069
  7. Formulate a “GetFeature” request for this service for the “GovernmentalUnitCE”
    <FeatureType>.

    http://frameworkwfs.usgs.gov/framework/wfs/wfs.cgi?DATASTORE=Framework&REQUEST=GetFeature&SERVICE=WFS&TYPENAME=GovernmentalUnitCE&VERSION=1.1.0&SRS=4269&BBOX=-179.14221197,18.9108417,-66.94983061,71.35256069&

    Run “OGRINFO -so” on the returned GML document. Include the output of
    the command in your writeup with the WFS command you generated for the request.
    After you save the file to your local hard drive, you may need to change the filename so that it
    ends with .xml so that OGRINFO recognizes it as a GML file. Make sure to add the layer
    name from the intial OGRINFO command in the complete command, so that you see the
    more detailed information about the specific layer within the returned GML file (for example:
    ogrinfo -so <gml file name> <layer name>)

    Had to open data source read-only.
    INFO: Open of `wfs.cgi.xml'
    using driver `GML' successful.

    Layer name: GovernmentalUnitCE
    Geometry: Unknown (any)
    Feature Count: 147
    Extent: (-160.247150, 18.910840) - (-109.927190, 46.001060)
    Layer SRS WKT:
    (unknown)
    instanceName: String (15.0)
    instanceCode: Integer (0.0)
    effectiveDate: String (10.0)
    governmentalUnitType: String (20.0)

Question 2

The GetCapabilities request to the DataFed WCS service for the MOD14A1 thermal anomalies data product is:

http://webapps.datafed.net/LPDAAC_G_OL.ogc?SERVICE=WCS&REQUEST=GetCapabilities&VERSION=1.0.0

Answer the following questions based upon the information available from the provided XML metadata record.

  1. Whom should you contact with questions about the service?  rhusar@wustl.edu
  2. What are the names of the two <CoverageOfferingBrief> elements representing the two data
    products that are available from this service?  MOD14A1,  MYD14A1
  3. What can you infer from the content of the <CoverageOfferingBrief> <gml:timePosition>
    elements about the time span for which data are available? Time frame for data: 2006-05-25T00:00:00 to 2007-08-12T00:00:00
  4. Formulate a DescribeCoverage request for the “MOD14A1” coverage. Answer the following questions from the information provided by the returned metadata record.
    4.1. What is the native SRS/CRS for the coverage?  urn:ogc:def:crs:OGC:1.3:CRS84
    4.2. What data formats are supported by the service for the delivery of this coverage?  CSV CSVWN cube-header-dump cube-text-dump dataset dataset-schema GeoTIFF GML image/gif image/jpeg image/png image/tiff internal JSON NetCDF NetCDF-sts NetCDF-table ogr-featurecollection sts-header-dump sts-text-dump table-header-dump table-text-dump
  5. Formulate a “GetCoverage” request for the “MOD14A1” coverage. Save the file to your local
    hard drive, and use “GDALINFO” to examine the file. Include your “GetCoverage” request
    and output from the GDALINFO command in your writeup.

    http://webapps.datafed.net/LPDAAC_G_OL.ogc?SERVICE=WCS&REQUEST=GetCoverage&VERSION=1.0.0&COVERAGE=MOD14A1&CRS=EPSG:4326&BBOX=-180,-90,180,90,0,0&FORMAT=GeoTIFF&WIDTH=-1&HEIGHT=-1&DEPTH=-1&TIME=2006-05-25

    Driver: GTiff/GeoTIFF
    Files: LPDAAC_G_OL.tiff
    Size is 361, 181
    Coordinate System is:
    GEOGCS["WGS 84",
    DATUM["WGS_1984",
    SPHEROID["WGS 84",6378137,298.257223563,
    AUTHORITY["EPSG","7030"]],
    AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
    Origin = (-180.000000000000000,90.000000000000000)
    Pixel Size = (0.997229916897507,-0.994475138121547)
    Metadata:
    TIFFTAG_RESOLUTIONUNIT=1 (unitless)
    AREA_OR_POINT=Area
    Image Structure Metadata:
    INTERLEAVE=BAND
    Corner Coordinates:
    Upper Left (-180.0000000, 90.0000000) (180d 0'0.00"W, 90d 0'0.00"N)
    Lower Left (-180.0000000, -90.0000000) (180d 0'0.00"W, 90d 0'0.00"S)
    Upper Right ( 180.0000000, 90.0000000) (180d 0'0.00"E, 90d 0'0.00"N)
    Lower Right ( 180.0000000, -90.0000000) (180d 0'0.00"E, 90d 0'0.00"S)
    Center ( 0.0000000, 0.0000000) ( 0d 0'0.01"E, 0d 0'0.01"N)
    Band 1 Block=361x1 Type=Byte, ColorInterp=Gray