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ASPRSorg / LAS

LAS Specification
https://www.asprs.org/committee-general/laser-las-file-format-exchange-activities.html
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Add OGC endorsement #31

Closed esilvia closed 5 years ago

esilvia commented 7 years ago

Although the LAS specification is maintained by the ASPRS LWG, it is also endorsed by OGC. Should we explicitly state this in the Authority section? @hobu

hobu commented 7 years ago

Should we explicitly state this in the Authority section?

Yes, I think so. We should also point to supporting documents like the LiDAR Base Specification that have a lot of contextual usage of ASPRS LAS, which would be helpful to implementors trying to write software to support the specification in situations where the text is ambiguous or not detailed enough.

esilvia commented 7 years ago

Good idea. Is Karl on here yet? Having his input on language for the LBS would be useful.

esilvia commented 5 years ago

@hobu Can you generate a pull request that incorporates this change? I can't figure out how to phrase it.

esilvia commented 5 years ago

I noticed @hobu added a mild endorsement of the USGS LBS in the LAS specification to that pull request. I know the LBS is widely used as a de-facto standard for lidar collection and we actively try to keep them in sync, but are we all okay with its recognition within the spec itself?

@ASPRSorg/lwg Use :+1: or :-1: on this comment to express your opinion.

hobu commented 5 years ago

The endorsement was to simply point out that the LBS provides a lot of practical implementation guidance for how to use many of the features in the LAS specification. It is very helpful for a software implementer to see this kind of context to decrease the abstraction level of the specification, especially for some of LAS' more intricate features.

rapidlasso commented 5 years ago

I've never used the USGS LBS document for clarifying the LAS specification. Which points does it make more clear? I remember a pretty nice article written by Lewis about some of the intentions behind the new LAS 1.4 features. Shouldn't that be referenced as well?

esilvia commented 5 years ago

Here's a PDF of the spec with changes to the Authority section (§1.3): https://s3.amazonaws.com/asprs-las/LAS-specification-768ba771e98a6ffdea1bd36e0c7f1f47179cb7b0.pdf

rapidlasso commented 5 years ago

OT: Odd looking label for the block of point records in "Table 1: LAS 1.4 Format Definition".

hobu commented 5 years ago

I remember a pretty nice article written by Lewis about some of the intentions behind the new LAS 1.4 features. Shouldn't that be referenced as well?

Yes. Maybe a separate Resources section or something at the end. We could kick this ahead to R15 too.

esilvia commented 5 years ago

@rapidlasso Nice catch. I just fixed that one and another broken link in commit f1cf4b45afb8c1fea957767181f4e9e537c65082 here: https://s3.amazonaws.com/asprs-las/LAS-specification-f1cf4b45afb8c1fea957767181f4e9e537c65082.pdf

I like the idea of a Resources section at the end. I'll split out that part and spin off an issue about that. It could link the Wiki, the PE&RS article by @lgraham-geocue that I currently have printed on my desk but can't find the PDF link, and and USGS LBS.

esilvia commented 5 years ago

See #71 for external resources discussion.