Questions tagged [standards]

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

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Seeking ISO 19131 DPS XML Schema File?

Does an implementation of ISO 19131 (Data Product Specification) as an XML Schema File (XSD) exist, or anything that can help regarding XML and 19131?
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49 views

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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36 views

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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28 views

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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1answer
49 views

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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1answer
64 views

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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2answers
168 views

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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58 views

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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212 views

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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1answer
954 views

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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1answer
68 views

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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1answer
163 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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1answer
414 views

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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198 views

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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1answer
400 views

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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1answer
105 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 ...
6
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1answer
127 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 ...
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793 views

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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102 views

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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852 views

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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30 views

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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1answer
2k views

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 ...
2
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1answer
54 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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2answers
96 views

What is the CAD equivalent of OGC?

The GIS industry has the OGC. What standards does CAD software have?
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1answer
3k 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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1answer
73 views

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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77 views

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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1answer
3k 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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1answer
258 views

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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609 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 ...
2
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2answers
358 views

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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2answers
7k views

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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1answer
467 views

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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1answer
407 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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2answers
1k views

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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1answer
433 views

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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1answer
141 views

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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1answer
88 views

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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1answer
8k views

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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1answer
725 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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2answers
884 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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108 views

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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1answer
191 views

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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2answers
172 views

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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1answer
451 views

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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2answers
20k views

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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0answers
80 views

Is there an easy common gis abstraction available in .Net [closed]

Is there an easy common gis abstraction available in the .Net programming world that cuts the dependency to a concrete gis implementation, e.g. to the esri silverlight/wpf sdk. ... for example ...
4
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3answers
388 views

Where can I find Specifications for Canadian National Topographic Map series?

At one time the Natural Resources Canada had the specifications for the National Topographic Series (NTS) maps online at http://www.nrcan.gc.ca/earth-sciences/cartospecs. It included things like the ...
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1answer
162 views

Looking for symbology for NAICS codes

I am curious if anyone has come up or has a good graphic style they can share that is symbology for NAICS codes. I have a large dataset that I want to symbpolize based on the 2 digit NAICS industry ...
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4answers
362 views

Good introduction to INSPIRE?

Can anyone point me to a good introduction to the INSPIRE directive? I know it's basically WMS 1.3 with added bells and whistles but now I'm back in Europe I should probably find out what they are.