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

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5
votes
2answers
96 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 ...
1
vote
1answer
32 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 ...
0
votes
0answers
70 views

Standard tile origin coordinates for EPSG:3857

Is there a standard tile origin for caching tiles in EPSG:3857? For example OpenLayers as default uses this tile origin for a WMS in mercator projection: lon: -20037508.34, lat: -20037508.34
2
votes
1answer
88 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 ...
1
vote
2answers
204 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 ...
5
votes
1answer
156 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 ...
4
votes
1answer
115 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 ...
0
votes
1answer
42 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 ...
8
votes
1answer
1k 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 ...
6
votes
1answer
239 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 ...
3
votes
2answers
524 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 ...
3
votes
0answers
63 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 ...
0
votes
1answer
123 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 ...
2
votes
2answers
133 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 ...
3
votes
1answer
199 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 ...
2
votes
2answers
3k 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 ...
3
votes
0answers
63 views

Is there an easy common gis abstraction available in .Net

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
votes
3answers
175 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 ...
1
vote
1answer
137 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 ...
10
votes
4answers
272 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.
3
votes
1answer
373 views

Standard Colors for Landcover Maps

I have classified Landsat images into five classes - A variety of Palm, Water bodies, built-up/open area, other vegetation and miscellaneous. I used GRASS GIS for the process and the final classified ...
13
votes
5answers
372 views

Standardised Spatial Information System Vocabulary

I've had some musing about this for some time and thought I'd ask the forum. Are there any resources out there that provide a standard, comprehensive dictionary of acronyms, terms and keywords for ...
0
votes
1answer
170 views

NHD Flowline legend colors?

Does Anyone have legend colors for the NHD Flowline that USGS sets colors for theirs ? I'd like to get a copy of their color legend. They can be from their website, brouchure, lyr files or anything ...
10
votes
3answers
688 views

Are there ISO 19131 compliant spatial dataset specifications?

ISO 19131 is a standard for spatial dataset specifications (the way a dataset is created and supplied). Do you know examples of specification documents (possibly available online) compliant with this ...
13
votes
4answers
2k views

Data naming convention - starting with a number

My company uses ArcGIS and has a project and data file naming standards in place and (for the most part) followed. Something that has always bothered me about he naming standards is that it mandates ...
3
votes
1answer
370 views

Is there an international standard with GIS symbols for power distribution objects?

Like I said in title, Im wondering if there is a standard that points out symbols for power distribution objects, power plants etc... Thanks
4
votes
2answers
1k views

Are there water/wastewater utility GIS symbols for electronic markers?

I hesitate to ask for standard symbols, but is there a de facto standard symbol(s)? Or a popular set of symbols to use for electronic markers? Our utility will soon start marking with electronic ...
6
votes
2answers
302 views

Standards for creating a RESTful Geocoding webservice

I am about to start defining a new API which will allow our clients to perform Geo Coding lookups. I would like to follow any standards there are out there. However looking at a few examples: The ...
3
votes
1answer
128 views

What sample size should be used when applying the National Standard Spatial Data Accuracy (NSSDA)?

I'm less interested in what is recommended by FGDC, and more interested in information like this: SAMPLE SIZE AND CONFIDENCE WHEN APPLYING THE NSSDA, which suggests you need a sample of 100. Is there ...
24
votes
5answers
2k views

Are there any international standards for map symbology?

We are going to let our users add points, polylines and polygons to a map. Are there any international standards for map symbology? For example for emergency symbols?
10
votes
7answers
1k views

assign unique id to point features

The MassGIS parcel standard (http://www.mass.gov/mgis/ParstndrdVer1_5_1.pdf) utilizes a concatenation of the whole number portion of x- and y-coordinates to create a unique id (LOC_ID) for features. ...
7
votes
2answers
234 views

The arctic circle moves?

I heard today that the Arctic Circle, along with it's siblings the Antarctic Circle and the Tropics of Cancer and Capricorn, are different from year to year. Is that true? Can you please explain ...
20
votes
3answers
2k views

What was the rationale for the non-standard UTM zones near Norway?

UTM zones 30V, 31V, 32V, 31X, 33X, 35X, and 37X do not line up with the rest of the UTM zone grid. Why was this allowed? According to Wikipedia, UTM was developed by the U.S. Army Corps of ...
3
votes
1answer
166 views

Is there a standard for displaying US vs. State highways on map?

My question is whether anyone is aware of a standard for how State roads, US roads and interstates should be displayed on a map? Not the label, but standards for the color and width of the symbology ...
6
votes
4answers
2k 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 ...