Questions tagged [standards]

Technical documents that detail interfaces or encodings as well as standards of practice.

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Adding new metadata standard to GeoNetwork using only XSD file

I've installed GeoNetwork v4.0.5 in a Tomcat server and I'm trying to add a new standard other than preinstalled ones. The problem is that I didn't found the schema plugin to do it, so I've been ...
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Storing Line(2D) data in Navigation Data Standard format as geometry using SpatiaLite

Is it possible to store Line(2D) data in Navigation Data Standard format(with coordinate bit shift) as geometry into SQLite and also make use of SpatiaLite functions for querying? I have to use ...
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1 vote
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What are the known standards to map country names to super regions APAC, EMEA, and AMER?

I am looking for country-superregion mapping for the following super regions: APAC = Asia Pacific EMEA = Europe, Middle-East and Africa AMER = North, Central and South America So far I have only ...
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In a Network is Valve a Line or Point in GIS Standard?

I am designing a GIS Database related to Gas Network. In my opinion Valve equipment is a link equipment which can be closed or opened, So it should be a Line. But lots of clients gather this data as ...
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Standard(s) to store and share geolocation and 3D orientation data for an object, e.g. a raster

As an example, GeoTIFF is a great standard to embed geolocation data into a raster file for cartographic purposes. But in that case, raster files are usually supposed to be on the projection plane. ...
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2 votes
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Loading and displaying NDS (Navigation Data Standard // SQLlite)?

On QGIS 3.4 (Windows), I would like to load and display NDS (Navigation Data Standard) data (attributes and geometry). I succeed in loading NDS data sample from openlanemodel. Via the QGIS DB manager,...
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Identifying geometry format?

I have a database with geometries encoded in a field in the following format: '1 L 410012.85,416177.69; +30.16,4; 12.46,0; 13.35,-0.67' Where L specifies that it is a Polyline, then 410012.85,...
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Choosing method for labeling graduated data that is space efficient? [closed]

Could someone recommend the best standard approach to labeling graduated data ranges? I was thinking of the following but would like to know if this is industry standard: Less than 0 >0 - 100 &...
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Are there any international water bodies codes (oceans, seas, etc.)? [closed]

As you may know, there are 2 letter international continent codes: AF - Africa AN - Antarctica AS - Asia EU - Europe NA - North America OC - Oceania SA - South America But what about water objects ...
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1 vote
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Can OGC Simple Feature polygon's interior boundaries share an edge?

Is the polygon pictured below compliant with the OGC Simple Feature standard? There are two interior boundaries that share a segment so intuitively I would say it is not but I have not been able to ...
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6 votes
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Custom scalebar with half-segments in QGIS

I am trying to recreate a scalebar thats part of a norwegian standard (NS3039) in QGIS. QGIS makes these half-segments for negative values (highlighted in red in the picture below 1, but I want ...
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MapProxy - Is it possible to get uniform WMS GetfeatureInfo info_format?

This is my very first mapproxy tagged question, so I hope it makes sense. I am developing a WebGIS client in my spare time, and now I am mainly focusing on my first type of OGC service: WMS. ...
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7 votes
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Can LINESTRING "contain" POINT?

According to Wikipedia, The predicates Contains and Within have subtle aspects to their definition which are contrary to intuition. For example,[10] a line L which is completely contained in the ...
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Recommended starting point for an OpenLayers v5 (node.js and npm) project

I have a large monolithic OL4 js/php system that I have hacked together in the last year, that has lots of raster and vector functionality driven by json parameter files. I want to refactor/rewrite ...
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1 vote
1 answer
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Are there any standards for geocoder APIs?

I recently did some research on geocoding services, and noticed that seemingly every API is unique. Unique in both the request format and the results returned. However, the general functioning of most ...
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13 votes
1 answer
387 views

Is the ST_ prefix appropriate for functions not included in SQL/MM Part 3?

I was reading a thread on the geospatial extension for Presto in this Github issue, where a function, line_locate_point, was introduced. It was based off PostGIS's ST_LineLocatePoint function, which ...
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Is MULTICURVE geometry in WKT valid according to the standard and open source community?

We are using Oracle function (SDO_UTIL.TO_WKTGEOMETRY) for exporting geometry to WKT. Some geometries have MULTICURVE in WKT, like this one: MULTICURVE (COMPOUNDCURVE (LINESTRING (3451418.006 5481808....
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How should the bounds of decimal and degree coordinates be programmatically handled in respect to hemispheres? [closed]

Are the bounds inclusive of 0, 90/180? Many systems and libraries simply clamp it to from -n to +n without considering zero. In many of these cases the handling of 0 is arbitrary (which hemisphere it ...
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GPS accuracy threshold standard

So obviously different applications would require different levels of accuracy, but I'm wondering if there's some standard threshold that the field typically determines to be "good" (or "good enough")....
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4 votes
1 answer
179 views

Standard direction format in GIS software

I am working on an application, where the user can place some items on a map. Some of these items have a direction, currently saved as radians where 0 is towards right/east. We want to enable the user ...
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6 votes
1 answer
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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 ...
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Where can I download ISO 3166-2 data? [duplicate]

I am looking for latitude and longitude coordinates of french subdivision. I am not used to GIS but I saw that ISO 3166-2 contains default code of such subdivisions, their name etc but where can I ...
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1 answer
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Can caving systems be represented in GeoJSON/TopoJSON?

I've been looking over the GeoJSON/TopoJSON specs (as best I understand it TopoJSON is an extended GeoJSON standard which uses 'arcs' to combine features into topography rather than have each polygon ...
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Serving 3D Via WFS [closed]

I have been trying to understand 3D data serving through WFS, but the number of competing standards and their spotty support has me baffled. Hence, I was hoping for some clarification from those who ...
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1 vote
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Looking for Web service standard to disseminate water level data

I’m about to lead a project that has to disseminate observed, forecasted and predicted water level data coming from tide gauges. I did a lot of research to identify which dissemination standards to ...
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7 votes
1 answer
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Encoding properties for each point in a GeoJSON multipoint

I'm working with GeoJSON Multipoints and wondering if there's any way of encoding properties for each point in the array? I realise this is a vague question but I'm looking for suggestions as to how I ...
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2 votes
1 answer
58 views

Any standards for urban rainwater drainage network?

I am starting to work on a project related to urban drainage networks. Are there any standards out there to represent this kind of network? Relevant attributes would be things like pipe section, pipe ...
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3 votes
2 answers
116 views

What is the CAD equivalent of OGC?

The GIS industry has the OGC. What standards does CAD software have?
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1 vote
1 answer
5k views

What is the color standard for roads or Transportation for USA?

Are there color standards for US Transportation roads such as Interstate, County,, Interstate, local, private, state highway and other roads out there ?
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1 vote
1 answer
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Different kinds of time+spatial data

I work on a geospatial aggregator. We support certain kinds of temporal data, but we don't have clear names for the different types, and I don't have a clear understanding of the range of geospatial+...
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Standard for geospatial CSV with either lat/lon or region encoding

I'm tasked with finding a standard for data providers to publish data that is linked to either points (lat/lons), postcodes, or local government areas (Australian term for councils). The data will be ...
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2 votes
1 answer
5k views

Format of raw LiDAR data (time-of-flight data)?

I am doing a project where I need to simulate LIDAR data, and I am looking for specifications on how raw LIDAR data looks. I want the format of the data before it is translated to x, y and z ...
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1 answer
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Is the pixel aspect ratio of a raster dataset always 1:1?

When we are talking about rasters, is the spatial resolution of the pixel defined in a raster dataset always fixed to a ratio of 1:1, eg, 1m x 1m ?
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6 votes
2 answers
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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 ...
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2 votes
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Address Fields in Canadian Municipal Data Model

I'm looking at the Postal address table in Esri's Canadian Municipal Data Model. There are some fields in there I don't understand, and wondered if anyone could help me out. The fields are: INTSTATE ...
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16 votes
2 answers
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Is there a standard for the specification of .prj files?

We use shape files for data exchange. I've looked at the .prj files: different programs produce different prj files. Is there a standard how the parameters must be specified in a prj file? AFAIK the ...
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1 answer
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Creating tool for metadata standard for spatial data?

I am looking to develop a tool to make cadastral metadata in a particular scenario. I would keep the ISO standards for meta in view of my development. Any suggestions in creating the tool for ...
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4 votes
1 answer
481 views

RDF representation of 3D-geodata?

When it comes to 2D-data it seems there are a couple standards out there to represent it in a semantic way (GeoSPARQL, NeoGeo, ...). However I couldn't really find one to do that for 3D-data. I have ...
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1 vote
2 answers
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Is there a consumer-level handheld GPS that can use standard GIS data as its background layer?

I'm shopping around for a handheld GPS, and from what I'm seeing, none of the big vendors (Garmin, Magellan and Delorme) make a unit that can use, for example, a simple georeferenced TIFF or a ...
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1 answer
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LiDAR Feature extraction specifications/standards

I have vector data representing forests/trees/buildings that have been automatically extracted from LiDAR data. I am looking for specification/guidance for LiDAR derived products, or any standard for ...
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4 votes
1 answer
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What is the best format to encode polygons such as lakes?

I am looking for a standard format to encode polygons, such as lakes, in one file that is easy to create and common so that others can use it in different GIS systems. Every file will contain data on ...
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GML Simple Feature compliance test

I'm in the process of defining a GML schema from a database schema, the idea is for it to be GML simple feature compliant. However I can't find a way to confirm this compliance other than reading the ...
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21 votes
1 answer
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Where can I find the WKT standard or reference?

I had a little confusion about the representation of a geometry as well-known-text (WKT). I was searching for the WKT Specs to search for the exact representation, but I did not find the Standard. Is ...
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15 votes
1 answer
941 views

Standard for storing human metadata in spatial databases

Is there an existing, standard, universal approach (and hopefully existing tools that support managing it) for storing geospatial metadata in non-ESRI spatial databases alongside (and therefore able ...
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3 votes
2 answers
904 views

What is the relationship between SDSFIE and C/JMTK?

C/JMTK = Commercial Joint Mapping Toolkit = http://www.cjmtk.com/ SDSFIE = Spatial Data Standard for Facilities, Infrastructure & Environment = http://www.sdsfie.org I've been working on a ...
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Are there any common field names for the FGDC street address standard fields?

I have been looking into implementing the FGDC street address data standards so that my address data is potentially consistent with other US data I obtain in the future. However, the FGDC ...
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-1 votes
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WFS service is not OGC compliant

I am quite surprised to discover several WFS services (v1.0.0) running on the web which are not compliant with the OGC WFS-1.0.0 standard. In the framework of my project, I use a JAXB binding built ...
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3 votes
2 answers
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Are there open standards for storing multi-modal routing graphs?

I'm looking for any open standards (or maybe best practices) for storing multi-modal routing graphs, eg. info for pedestrian, bike, public transport and car routing, etc. Every data provider seems to ...
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Is there a standard st_relation_readable() function for translate DE-9IM strings?

Spatial databases, such as PostGIS, implement the DE-9IM model with function st_relate(), which returns a string with domain of {0,1,2,F}, meaning 0=point, 1=line, 2=area, and F="empty set"... See DE-...
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13 votes
2 answers
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How are EGM96 and WGS84 related to each other?

As far as I understand the EGM96 defines the Geoid, where as the WGS84 Standard defines the Ellipsoid. Is the ellipsoid defined in the WGS84 standard defined in a way to maximize the congruency with ...
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