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Yes, srsName="EPSG:abcd" is GML-3 compliant but only in an application context where EPSG:abcd points to a CRS definition. As of 2013, OGC best practice (documented here) is to use http URIs of the form http://www.opengis.net/def/crs/EPSG/0/4326.
The GML-3.0.0 spec (OCG 02-023r4) section v.2, page xiv states aliasing CRSs is kosher:
in GML we have found ...
9
You've caught a lot of the differences. Esri never adopted the WKIDs for the map projection algorithms or parameter names so those are all different. We didn't agree with how carefully defined the parameter definitions are. Ours are more generalized.
We don't support TOWGS84 nor some of the newer keywords.
When we compare strings (names), we ignore the ...
8
The official OGC “Well-known Text Representation of Spatial Reference Systems” for EPSG 4326 (http://spatialreference.org/ref/epsg/4326/ogcwkt/) is (your second projection):
GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",...
8
A Nested Shell is a polygon on top of another polygon.
Image source
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From W3C's Extensible Markup Language (XML) 1.0 (Fifth Edition) recommendation:
[Definition: The XML document type declaration contains or points to markup declarations that provide a grammar for a class of documents. This grammar is known as a document type definition, or DTD. The document type declaration can point to an external subset (a special kind ...
7
No, GeoJSON is not an OGC standard:
IETF Geographic JSON Working Group
The Internet Engineering Task Force, in conjunction with the original specification authors, has formed the Geographic JSON WG to standardize the format. Work continues on GitHub at https://github.com/geojson/draft-geojson.
7
As @PolyGeo suggested, I am converting my comments into an answer. The answer is split into three parts to broadly reflect the three comments I made.
Part 1
Roy Fielding's dissertation that described Representational State Transfer (REST) amongst other architectural styles Architectural Styles and
the Design of Network-based Software Architectures was ...
7
Polygons are not simple to handle and there are more than two worlds. I recommend to read this article "About Invalid, Valid and Clean Polygons" http://www.springer.com/%3FSGWID%3D5-102-45-124048-p32597622
The GeoJSON specification https://tools.ietf.org/html/rfc7946 says that "GeoJSON comprises the seven concrete geometry types defined in the OpenGIS ...
6
Every XML document essentially has some given structure. When the structure is formally specified, we usually talk about a given XML grammar.
The formal specification can take many forms, e. g. DTD (Document Type Definition) or XML Schema Definition (XSD). XSD itself is a XML document and is now being used for GML. There are also other means of specifying ...
6
When someone designs a class of XML documents for representing information in a particular domain, they will sometimes call this an XML grammar, or a vocabulary, or a schema, or a document type, or even a language. The terminology isn't consistent. There's perhaps a different emphasis: calling it a schema implies that an XML Schema is the primary way in ...
6
Normally on each OS QGIS will install the settings in a different location, however there is a switch you can start QGIS with to redirect these settings.
When you start QGIS you can start it with the --optionspath and --configpath switches which you can point to a different location.
QGIS will now create all the settings in a ini format and move the .qgis2 ...
6
I don't have such a list, but going through the GDAL code will guide you:
https://svn.osgeo.org/gdal/trunk/autotest/osr/osr_esri.py
https://trac.osgeo.org/gdal/browser/trunk/gdal/ogr/ogr_srs_esri.cpp
https://trac.osgeo.org/gdal/browser/trunk/gdal/ogr/ogr_srs_esri_names.h
https://trac.osgeo.org/gdal/browser/trunk/gdal/ogr/ogrspatialreference.cpp
6
There is SLD (Styled Layer Descriptor), which I think is mainly used in OpenGIS environments. ArcGIS might have some support for it, but I have never pursued that option myself.
5
You could try an OGC Web Map Context (WMC) file.
Certainly there is a WMC client extension to add WMC support to ArcGIS Desktop.
The purpose of the WMC file is to bundle together web services (such as, but not limited to, ArcGIS services), such that you can share maps composed of Web Map Services to aware clients...
For example the following WMC of the ...
5
If you are working with geometry types beyond the usual point/line/polygon/collection or are working with more than 2 dimensions, then yes, get the ISO spec. Otherwise, no. Also get the old OGC guidance on WKB for higher dimensions (or read the PostGIS doc) in case you're worried about maximum interoperability. (For 2d and simple geometries the new ISO stuff ...
5
Looks like you have a self-intersection, which SQL Server no likey. I'm surprised it even got loaded into the database in the first place. Try running MakeValid() and see what it does to the shape. You don't have to test it on the original data, just make a new one on the fly in Management Studio.
What's interesting is that SQL Server will plot it:
But it ...
5
GeoNetwork Opensource and the Esri Geoportal Server are two open source and free technologies that can be used to build Catalog Services for spatial information, and are both a great start.
However, I think both could do with more work on usability.
For example, Catalog Services from the Esri Geoportal Server can be accessed from ArcGIS for Desktop to ...
5
i think you should use WCS instead of WMS for sharing raster datasets on the Web. AFAIK, wms dont have this capabilities for sharing tiff images.
From Wikipedia:
Unlike OGC Web Map Service (WMS), which portrays spatial data to
return static maps (rendered as pictures by the server), the Web
Coverage Service provides available data together with their ...
5
The .lyr format is a closed ESRI only format. It has not been reversed engineered. If it was, we could add support in theory but I suspect it would be an expensive task.
5
The QGIS client plugin is a good one - I was able to access the features of WFS without issue.
ArcGIS has an interoperability connections feature that must be enabled by a user with administrator access first however I didn't try to get this working as the license is 2.5K and I don't have that license
OpenLayers supports WFS as does GRASS - I found that ...
5
The Open Geospatial Consortium (OGC) exists to define interface standards such as the Web Mapping Service (WMS) standard, or Web Feature Service (WFS) standard. These are standards that define how programmers should create software to provide such a service.
So for example, OGC defines the WMS standard, programmers write a piece of software called ...
5
dimension(): refers to the topological dimension (i.e. point/line/area)
coordinateDimension(): returns the dimension of the tuple as given (as statet in the OP)
spatialDimension(): returns the dimension of the tuple without the measurement part (with "M" being the measurement in a linear reference system)
As it's pretty obvious for a 2D or "4D" literal, you ...
4
It's CSW. Look here for more information about it than is healthy for one person to read.
Funnily enough in the spec, the abbreviations section has:
CSW Catalogue Service-Web
So I can see where the hyphenated version comes from, but I've not noticed it in any official documentation.
4
This question has been converted to Community Wiki and wiki locked
because it is an example of a question that seeks a list of answers
and appears to be popular enough to protect it from closure. It
should be treated as a special case and should not be viewed as the
type of question that is encouraged on this, or any Stack Exchange
site, but if ...
4
This following one is correct:
/WFS_Capabilities/Service
as defined by the following portion of the schema definition for version 1.0.0
<xsd:element name="Service" type="wfs:ServiceType"/>
Take a look at 12.3.3 Service section in the Web Feature Service Implementation Specification (OGC 02-058)
4
WCS is the less-used of the WMS/WFS/WCS triangle so there isn't as much out there as you've probably noticed.
However, making requests is really really easy and you don't really need a special library. Arguably its the easiest of the three from a users perspective because you get a nice simple file back.
A valid request looks something like this:
http://...
4
Really not a definitive answer but an answer to complete more (waiting community :) !
The main ideas why SLD is not used everywhere as a data exchange is history, verbosity, extensibility, output support.
History
ArcGIS comes before the SLD standard exists.
MapInfo format doesn't separate style from content so you can't separate data from rendering like ...
4
Since you have put a bounty, let me try to explain why you are not likely to get a favourable Answer.
For your WMS/WFS services to appear as an ArcGIS Server Services, the Intermediary wrapper must implement, what ESRI Calls the GeoServices REST Specification
If you take a look at just the specification, it is vague in many respects. There are many other ...
4
There is no concept of zoom "levels" in the WMS specification, as there is for an XYZ/TMS. Rather, your WMS requests just use a bounding box which determines map scale.
4
Note only a GeoServer based WFS will understand a CQL filter, you can and should use an OGC Filter to achieve this effect too.
You can use one (or more) of the ECQL temporal filters for this. I would probably use something like the following for your query:
DATE_TIME during 2017-02-28T00:00:00Z/P1D
to find all features that occurred today - the time ...
Only top voted, non community-wiki answers of a minimum length are eligible
