Questions tagged [ogc]
A geospatial standards organization known as the Open Geospatial Consortium
163
questions
16
votes
0answers
366 views
Servers that implement OGC Geo/Time OpenSearch [closed]
The OGC is has published the "OpenSearch Geo and Time Extensions". That specification is based on, but extends, the OpenSearch Geo extension and OpenSearch Time extension.
As it turns out, I'm ...
13
votes
2answers
4k views
How to secure WFS services?
I'm currently tasked with finding a way to deploy WFS services to a number of clients. The services could be consumed by both desktop GIS software e.g. MapInfo/ArcGIS or by Web GIS solutions.
Is it ...
13
votes
1answer
10k views
What's up with the GeoJSON spec and CRS as a IRM?
I'm writing a web API to our GIS data, currently revamping our geocoding service. I'm creating the option for folks to specify the output type as GeoJSON so I'm trying to follow the spec. Our data is ...
13
votes
7answers
2k views
Is there an exhaustive, searchable catalog of all GIS web services (e.g. OGC WMS/WFS, REST, SOAP)?
Many of us have struggled to get a list of GIS services that are available on the internet. Specifically map services that expose OGC based interfaces like WMS, WFS or Web Service interfaces like REST,...
11
votes
1answer
2k views
Is srsName of “EPSG:4326” spec compliant in GML 3.1 / 3.2?
I sometimes see srsName="EPSG:4326" in GML documents (e.g. https://postgis.net/docs/ST_GeomFromGML.html, although my particular source is not public). The intent (except perhaps for axis order that ...
11
votes
1answer
849 views
Why is the OGC Symbology Encoding standard not being implemented and is SLD an alternative?
I searched exhaustively over the internet as well as at this Exporting Symbology from ArcGIS for Desktop to Microstation or QGIS? but didn't find a satisfactory answer. Hope to get the answers from ...
10
votes
3answers
844 views
What does it mean “GML is an XML grammar”?
I'm trying to get my head around the theoretical side of XML and GML. The OGC web page for GML states that:
The Geography Markup Language (GML) is an XML grammar for expressing
geographical ...
10
votes
4answers
5k views
How are ESRI WKT projections different from OGC WKT projections?
Does anyone know the precise list of differences between ESRI WKT and OGC WKT projection format strings?
I know there are various tools to help convert from ESRI WKT to OGC WKT, including GDAL ...
10
votes
1answer
786 views
Differences between OGC and ISO WKT/WKB specification?
Are the OGC-Simple feature access and the ISO (ISO/IEC 13249-3:2011 "Information technology - Database languages - SQL multimedia and application packages - Part 3: Spatial") significantly different (...
9
votes
2answers
1k views
Seeking free Web Processing Service (WPS) client?
A number of products seem to be implementing the server side of the OGC Web Processing Service (WPS 1.0.0) and these are listed at the OGC's Implementations by Specification page.
Is there a free ...
9
votes
1answer
312 views
Driving Zone Computation using Web Processing Services
I am currently evaluating different OGC Services(WFS,WMS and WPS) for driving zone computation. As I am new to WPS services, I would like some suggestions regarding which OGC services to implement.
...
8
votes
4answers
367 views
are there UML models of the OGC standards available online (native files not pdfs)
Last time I checked, there were only PDFs with class diagrams available on the net (downloadable for at least 140 swiss francs a piece) , but not the UML models in a native format of a database ...
8
votes
1answer
2k views
When validating geometries, what are “Nested shells”?
I am validating shapefiles polygon geometry using shapely, and have also attempted it using FME. Some polygons return the error "Nested Shells".
I cannot find a definition of what the problem is, ...
8
votes
3answers
1k views
What's the difference between coordinateDimension and spatialDimension?
The OpenGIS standard mentions three methods to query the dimensions of a Geometry:
dimension(): the inherent dimension of the geometry:
0 for Point
1 for Curve
2 for Surface
coordinateDimension(): ...
8
votes
1answer
372 views
Validity standard for GeoJSON polygons?
There are two different ways the polygon below can be represented:
In ESRI-land, the polygon would be modeled as a single exterior ring that loops back on itself.
In the OGC world, it would be ...
7
votes
1answer
4k views
Are these two OGC WKT projections the same? And if so, why are their reference strings different?
So here is the .prj text of a federal shapefile dataset of all public airports in its native OGC WKT format:
GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],...
7
votes
3answers
5k views
Making OGC WMS/WFS look like ArcGIS Server layer, including functionality?
Esri contacted me about this question. After a good talk the conclusion was that it is not wise to build a wrapper around WMS/WFS because of possible changes to the REST interface of ArcGIS Online ...
6
votes
4answers
3k views
How many WFS-T clients exist?
I would like to know which applications or libraries (proprietary or open source) offer transactional Web Feature Service (WFS-T) client functionality. Those include:
Desktop or online applications ...
6
votes
2answers
3k views
OpenLayers filter: OGC (xml) or CQL?
While having not used filtering that much in OpenLayers, we are discussing which type of filtering we should use: The OGC XML filter or the more simple CQL filter?
Are one of them more appropriate ...
6
votes
1answer
2k views
REST API for OGC standards
I can access WMS and WFS using SOAP and XML.
Is there an option to access it using REST and JSON?
I have gone through the specification and couldn't even find the word REST mentioned once.
6
votes
1answer
130 views
Is there a common standard for how GIS information is displayed?
New to GIS programming so this might be a silly question. Is there a standard way to store/transmit how a GIS feature is to be displayed? So I can see there's loads of standard ways of storing tha ...
6
votes
2answers
709 views
Is there an open standard for raster information?
For geographic vector data (Features) there is an OGC standard that defines geometries and their different annotations such as WKT and WKB.
For raster image data however, I was not able to find ...
6
votes
1answer
1k views
How to automate downloading “slices” of data from Web Coverage Service (WCS)?
I'd like to automate downloading "slices" of data from a WCS service. This is a WCS 1.1.2 service, supporting netCDF. The data are updated daily - forecasts from an atmospheric regional model - and I'...
6
votes
1answer
227 views
What is the OGC way of representing Related features?
I have a point shapefile of Persons (The point is located at the registered address of the person) and a polygon shapefile of parcels.
There is an owner_id attribute in the parcels shapefile, which ...
5
votes
3answers
1k views
Open .NET implementation of the OGC Geometry Object Model from Simple Feature Access 1 specification?
I am looking for a .NET implementation of the geometry object model described in OGS's Simple Feature Access, Part 1 specification.
Preferably lightweight. I don't need WKT support, just the ...
5
votes
2answers
8k views
OpenLayers: Combine multiple OGC filters
I have two OGC filters client side:
<ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
<ogc:PropertyIsEqualTo matchCase="true">
<ogc:PropertyName>code</ogc:...
5
votes
3answers
338 views
What are my options in terms of implementing a WPS server?
I know about PyWPS, are there any good alternatives?
5
votes
1answer
764 views
Using CQL for a poor man's temporal filter on a server offering only WFS 1.1.0
There's a WFS I'm accessing via script to pull in features that will match a particular day. The attribute I care about in the output is DATE_TIME. However because it's WFS 1.1.0 it does not support ...
5
votes
1answer
2k views
Reading OGC geometry data from SQL server using R
I would like to write a script in R that creates a map using OGC geometry data that is stored on a Microsoft SQL server. Is there a way to read OGC geometry data using a query passed from R?
Maybe ...
5
votes
1answer
272 views
How to display some Ushahidi's layers (WFS) in my Web portal?
I'm working on a VGI Web portal. I'm using OpenLayers and the application is running through the TomCat server. I would like to know if it's possible to display layers from Ushahidi or others VGI ...
5
votes
1answer
2k views
STGeomFromText not working on large polygons
I'm using Microsoft.SqlServer.Types to do intersections on polygons.
SqlChars scFullSwath = new SqlChars(new SqlString(fullSwath));
SqlGeography fullSwathGeom = SqlGeography.STGeomFromText(...
5
votes
1answer
512 views
Are there any Geospatial OData Feeds?
I see that OData V3 has support for geospatial types.
Has anyone published a feed that uses the new geospatial data types?
4
votes
2answers
2k views
Is GeoJSON an OGC format
I am using geometries in a JavaScript page and it is best to use JSON objects rather than GML which is XML based. I heard of GeoJSON, but is it an OGC open format?
4
votes
3answers
174 views
Seeking open vector format for long term GIS data storage in off-line repositories?
Many field sciences require data management plans for their research data that specify how the data will be submitted for archival storage. These data come from various devices and are often in ...
4
votes
1answer
17k views
Seeking public Web Map Tiling Service (WMTS)?
Does anyone know of an "almost always available" service URL for a public facing Web Map Tiling Service (WMTS)?
I'm keen to test WMTS client capabilities without having to configure a WMTS server.
4
votes
1answer
260 views
Geometry Operands - BBOX vs Within - What's the difference?
What is the difference between the "BBOX" and "Within" spatial operators.
Can anyone please shed some light?
4
votes
1answer
1k views
Problem adding GeoJSON to MongoDB: Loop shares more than one vertex with its parent loop
I am trying to add GeoJSON data into MongoDB, but some of the GeoJSON shapes are failing due to the following error:
com.mongodb.MongoWriteException: Can't extract geo keys: ...Loop 1 shares more ...
4
votes
3answers
2k views
Mbtile To Geopackage and Vice versa
The geopackage open format offered by OGC for vector data (like that of shapefiles) supports map tiles (raster tiles) as well. The functionality is similar to mbtile format founded by mapbox. Is there ...
4
votes
1answer
506 views
Is there public OGC Catalog Service (CSW) available which lets ArcGIS for Desktop with CSW Client Add (WMS) To Map?
This is a follow on from a Question that I asked last year entitled Is there a public OGC Catalog Service (CSW) available?. That Question has an Accept-ed Answer but I would now like to expand upon ...
3
votes
2answers
378 views
File format (preferably open) for defining web service endpoints for ArcGIS Desktop?
Aside from .LYR files, is there a file format (preferably open) for defining web service endpoints for ArcGIS Desktop?
For example, if I publish a WMS feed, can I provide a downloadable resource for ...
3
votes
1answer
384 views
INSPIRE, GEOSS and OGC [closed]
(as simply as you can) what are the differences between INSPIRE, GEOSS and OGC?
I will explain what I understood:
The OGC provides standards for web-mapping that like WMS, WFS (are these standards ...
3
votes
1answer
409 views
How do I allow users to download a GeoTiff on my web map
I am hoping to get help with what I need to do in order to allow a user on my OpenLayers map to download a portion of a GeoTiff they are viewing through a WMS. The data is hosted through GeoServer. I ...
3
votes
1answer
551 views
SQLServer generating invalid WKT
I am a GIS novice using SQL 2008, with C# and the NetTopologySuite WKTReader type to work with some geometries.
I have some data which I have been able to save into the database but when I read back ...
3
votes
1answer
56 views
See WFS or WMS corresponding full http request in QGIS when a layer was added from any of these services
I have added both a new WMS and a new WFS server into a QGIS project, by specifying a generic GetCapabilities URL in the appropriate sections in the browser panel:
After that, I am able to add some ...
3
votes
2answers
112 views
What is the CAD equivalent of OGC?
The GIS industry has the OGC. What standards does CAD software have?
3
votes
1answer
67 views
What is difference between OGC and ISO standards - why do some open specs carry both standards?
A good example is the Simple Feature Access - "OpenGIS® Simple Features Access (SFA), also called ISO 19125". Why use one over the other? And why have both?
3
votes
1answer
317 views
WMTS: declare “GetTile” operation for statically hosted tiles?
Supposedly, one can turn a collection of static tiles, hosted according to the ZXY schema also used by OpenStreetMap tiles and Google Maps tiles, into a standard-conformant OGC WMTS by accompanying it ...
3
votes
1answer
360 views
Exporting GeoPackage layer to GeoJSON changes CRS from WGS 84 EPSG:4326 to OGC:CRS84
I'm attempting to convert a polygon layer from GeoPackage format to GeoJSON in QGIS 3.10.1. The original layer has a coordinate reference system of WGS 84 (EPSG:4326) which is what I need. Yet the ...
3
votes
1answer
234 views
Making my GIS application OGC compliant
We have a stack of open source software's which we use to build a GIS.
We would like to align our application to OGC as much as possible. I visited the site and read about the standards.
Now my ...
3
votes
1answer
1k views
Convert SqlGeometry data from SQL directly to Tiles / PNG file
I would like to know a basic method for 'exporting' SqlGeometry data from SQL Server 2008 to a Tile Server / PNG File generator. I already have a Silverlight Map application which uses a Custom Tile ...
