Status ReportGEO Task AR-06-06 Interoperability among

Digital Elevation Model (DEM)

Ryosuke Shibasaki

AR-06-06 Task definition

• Request input from system operators and data users (GEO members or participating organizations) regarding their experience on interoperability (including the metadata).

• Compile list of current DEM data and its specifications.• Based on the above results, develop the first "GEOSS

Interoperability Guidance on DEM data"

Deliverable outputs

• GEOSS Interoperability Guidance on DEM data.

Member Contacts

• 7 active members– Australia, China, Italy, Germany (ISPRS),

Japan, USA (OGC)– Communication via e-mail.

Steps Compile list of existing DEM products.

Focusing specs. and underlying standards.

Expected results and recommendations.•Format issues:

•DEM product format are so diversified.•However, not too difficult to convert one data format to the other.

•Not very necessary to standardize data format.•But desirable to promote the standardization of service interface for DEM data delivery.

•Quality:•To be explicitly described, if any quality associated information available.

•Coordinate Reference System:•To be explicitly stated so that the CRS conversion can be made more easily.

•Metadata standard:•Need to promote convergence. One candidate would be ISO19115 metadata.

Comparative analysis

Develop interoperability guidance on DEM

Steps Compile list of existing DEM products.

Focusing specs. and underlying standards.

Expected results and recommendations.•Format issues:

•DEM product format are so diversified.•However, not too difficult to convert one data format to the other.

•Not very necessary to standardize data format.•But desirable to promote the standardization of service interface for DEM data delivery.

•Quality:•To be explicitly described, if any quality associated information available.

•Coordinate Reference System:•To be explicitly stated so that the CRS conversion can be made more easily.

•Metadata standard:•Need to promote convergence. One candidate would be ISO19115 metadata.

Comparative analysis

Develop interoperability guidance on DEM

Steps Compile list of existing DEM products.

Focusing specs. and underlying standards.

Develop interoperability guidance on DEM

Expected results and recommendations.•Format issues:

•DEM product format are so diversified.•However, not too difficult to convert one data format to the other.

•Not very necessary to standardize data format.•But desirable to promote the standardization of service interface for DEM data delivery.

•Quality:•To be explicitly described, if any quality associated information available.

•Coordinate Reference System:•To be explicitly stated so that the CRS conversion can be made more easily.

•Metadata standard:•Need to promote convergence. One candidate would be ISO19115 metadata.

Comparative analysis

Steps Compile list of existing DEM products.

Focusing specs. and underlying standards.

Expected results and recommendations.•Format issues:

•DEM product format are so diversified.•However, not too difficult to convert one data format to the other.

•Not very necessary to standardize data format.•But desirable to promote the standardization of service interface for DEM data delivery.

•Quality:•To be explicitly described, if any quality associated information available.

•Coordinate Reference System:•To be explicitly stated so that the CRS conversion can be made more easily.

•Metadata standard:•Need to promote convergence. One candidate would be ISO19115 metadata.

Comparative analysis

Develop interoperability guidance on DEM

Items for the comparison• General information• Dataset name• Types of dataset• Dataset responsible party• Geographic location of the dataset• Dataset format name and version• Dataset standard name and version• On-line resource• Metadata standard name and version• Abstract describing the dataset•• Spatial representation and quality• Spatial representation type• Resolution• Accuracy of elevation data• Lineage information•• Coordinate Reference System• Geodetic datum name• Ellipsoid name• Elevation reference

ISO19115: metadataISO19111: spatial reference by coordinates

Timetable Compile list of existing DEM products.

Comparative analysis

Develop interoperability guidance on DEM

July to Aug. 2006

Aug. 2006

Sept. 2006