Hello all A FOSS4G event will happen in Boston in August (http://2017.foss4g.org). I would like to submit a talk about referencing issues, in addition to another talk about Apache SIS. The talk about referencing issues would not be related to a particular project. Below is the proposed abstract. Is there anything that should be changed? The deadline is Tuesday evening, in 48 hours (sorry for the short notice):
------------------------------------------------------------------------ Referencing by coordinates issues in open source softwares Referencing by coordinates are a critical foundation for geospatial softwares and is sometime though as a resolved problem. But pain points still exist both because of limitations in existing standards (some of them to be addressed in ongoing revisions), and because of the way some popular open source softwares implement the current standards. Geospatial users are facing interoperability issues caused by conflicting conventions on axis order, or by differences in interpretation of Well Known Text (WKT) version 1 (e.g. projection names, or scope of units of measurement other than degrees and metres). Errors happen because of the use of coordinate operations that are valid in a different geographic area. Smaller discrepancies exist because of implementation strategy choice, in particular the "early-binding" versus "late-binding" approaches. Advanced users face the lack of standard way to express temporal axis and pressure measurements in WKT 1, and pitfalls in definitions of planetary CRS. In this presentation we will review the current situation in light of the history of OGC standards. We will introduce Well Known Text 2 (ISO 19162) as a way to resolve many of above issues. We will discuss the risk of using map projection library as a black box and the importance of metadata allowing users to estimate the relevance and accuracy of their coordinate operations.
