[Requests] Comments on OGC CDB 1.0 Candidate Standard; CDB Board recommended Update 1 changes

David Graham david.graham at cae.com
Fri May 27 07:19:50 EDT 2016


PART A


1. Evaluator:  David Graham, CAE Inc.


2. Submission: OGC CDB 1.0 Candidate Standard RFC

The following comments comprise 'Update 1 to CDB V3.2'.  This update recommendation was developed by the legacy, industry-led CDB Leadership Board composed of representatives from CAE Inc, Presagis, and FSI.  These changes, editions, and recommended additions were developed during the two year period after CDB V3.2 was published in February 2015 up to the period of development of the OGC CDB 1.0 Candidate Standard, during bi-monthly meetings and from feedback from CDB developers and implementers.  This package of recommendations is available in its original version on the OGC portal here:  https://portal.opengeospatial.org/index.php?m=projects&a=view&project_id=466&tab=2&artifact_id=67429



PART B


1. Requirement: recommended new file size constraint for GSModel Archive


2. Implementation Specification Section number: 5.8.1


3. Criticality: Minor


4. Comments/justifications for changes:  Recommend add new section 5.8.1.1 GSModel Archive Size Limit.  The size of any GSModel archive is limited to 32 MB to permit reading, processing and writing the file at runtime.

Implementers have encountered GSModel Archives with sizes approaching 2GB; this limit is proposed for run-time performance reasons.

[Note:  this recommendation has been incorporated into the r1 draft of Volume 1]

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PART B


1. Requirement:  Changes to Composite Material Types


2. Implementation Specification Section number: 5.8.1, 5.8.2


3. Criticality: Minor


4. Comments/justifications for changes:

Recommended updates/changes to Dataset 308, 309, 310, 311, and 312; tables incorporating recommended changes follow:

        [Machine generated alternative text: Dataset 309, GSM0de1CMT  Dataset 311, GSM0de11nteriorCMT  * _xml Composite  Material  Table  Contains the definition of the composite materials  referenced by the model material datasets above.  Its fonnat is as specified in section 2_5.22,  Composite Material Tab es (]

        [cid:image008.jpg at 01D1B7E8.24964AA0]












[cid:image009.jpg at 01D1B7E8.24964AA0]

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PART B


1. Requirement: Volume 6


2. Implementation Specification Section number: 6.8


3. Criticality: Minor


4. Comments/justifications for changes: [Comments]

Recommend replacing the textual description of the concept of 'Significant Size' with new text from the Update 1 reference on the OGC portal.  The concept of Significant Size has been simplified and better described.


PART B


1. Requirement: Handling of Topological Networks


2. Implementation Specification Section number: Volume 1, Section 5.7.1


3. Criticality: Minor


4. Comments/justifications for changes: [full text of recommended changes are in:
https://portal.opengeospatial.org/index.php?m=projects&a=view&project_id=466&tab=2&artifact_id=67429





*       Addition of Section 5.7.1.6.4, Network Vector Priority

*       Addition of Section 5.7.1.9, Vector Significant Size and Spatial Significance Criteria

*       Addition of new text, Vector Priority Tile-LOD Generation


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PART B


1. Requirement: Addition of a Priority field to the Feature Data Dictionary


2. Implementation Specification Section number: Volume 9:  metadata/schema


3. Criticality: Minor


4. Comments/justifications for changes:


*       The FDD is stored in Feature_Data_Dictionary.xml

*       FACC codes recommended additions for Lineal Vector Datasets

*       Priority field in FDD is referred to in the new textual material recommended above in 'Vector Priority Tile-LOD Generation'

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PART B


1. Requirement: Additions to Countries List


2. Implementation Specification Section number:


3. Criticality: Minor


4. Comments/justifications for changes: [Comments]




*       337 - Serbia

*       338 - Montenegro

*       339 - South Sudan

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PART B


1. Requirement: Additions of new Airliners, Codes 287 to 297


2. Implementation Specification Section number:


3. Criticality: Minor


4. Comments/justifications for changes:

287


CJR Caverton Helicopters


288


KZR Air Astana


289


ROU Air Canada Rouge


290


DWT Darwin Airline


291


UTA UTair Aviation


292


AZN Amaszonas


293


FDB Flydubai


294


UZB Uzbekistan Airways


295


PGT Pegasus Airlines


296


ABY Air Arabia


297


AXB Air India Express



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PART B


1. Requirement: Metadata/Schema Volume 9


2. Implementation Specification Section number: Version.xml [described in section 5.1.6]


3. Criticality: Major


4. Comments/justifications for changes: Recommend an optional XML attribute for 'org' be added to Version.xml.  The optional 'org' attribute can be set to value "OGC" to clearly differentiate between legacy CDB versions (ranging from 1.0 to 3.2 Update 1) and OGC CDB versions

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