Questions tagged [data]

Any collection of related facts arranged in a particular format; often, the basic elements of information that are produced, stored, or processed by a computer.

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GIS Layer of USA State Court Jurisdiction Boundaries

Does anyone know of a national layer? Edit: Sorry for the delay in clarifying. I am looking for all courts (district, circuit, municipal, Superior, etc.) depending on the terminology used for the ...
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1answer
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How to read *.adf files into R?

I want to load .adf files into R. The data is from this page: http://www.fao.org/geonetwork/srv/en/metadata.show?id=14057 I tried the following code that I found after some research in the internet. ...
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640 views

How do you treat partial 3d features in PostGIS?

We have features from survey data that contain partial 3d information. The most common example would be a 2D LineString representing a road, that contains elevation information in certain points ...
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Seeking open raw LiDAR or laser scanner data? [duplicate]

I'm looking for aerial LiDAR or terrestrial laser scanner data in laz or las format preferably from an FTP site. Does anyone know which countries have that data available to the public? From my ...
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Where I can find world terrain data?

I need free terrain data for the whole world which I can import into TileMill. Is there some source where I can download them?
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5answers
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Where can I download free satellite imagery of Cambodia for offline use?

I am an entry level GIS user - I have had one semester of GIS in college. I have successfully downloaded raster satellite imagery from Seamless (tiff files) for my class project. Now I am trying to ...
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6answers
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Where can I get country, region, and city data?

I need the names of countries, country regions and cities of the world. Where do I get that kind of information?
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ESRI Field Names?

A shapefile I retrieved from the Pennsylvania Redistricting site contains field names like TAPERSONS, TA1RACE. TAWHITEALN. TABLACKALN... or VAPERSONS, VA1RAC, VAWHITEALN... Some online forensics ...
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Where can I find annual temperature data for every city and town in the US and Australia?

Where can I find yearly annual averaged temperature data for every city and town in the US and Australia for a heatmap? links are good
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6answers
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Can I download the entire NRCS SSURGO database?

I am interested in downloading and using the entire USGS SSURGO database. The California Soil Resource Lab provides instructions on working with these data in R, but it starts with the assumption ...
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Data Source: Address ranges for every block in NYC

I'm looking for data that defines the address ranges used on NYC blocks. On this screenshoot you can see google has noted the first addresses on each block of West End Avenue and 92nd/93rd/94th st. (...
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German coordinate system from Lat/Long

I have WGS latitude and longitude for data points near Munich and I'd like to use a grid-type coordinate system, like the Ordnance Survey grids in Ireland or the UK. What coordinate system do you ...
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Ordnance Survey grids - download or generate?

Does anyone know a source from which to download vector UK Ordnance Survey grids at varying resolutions? Or failing that, a tool that can create an OS grid at a specified resolution? There are plenty ...
8
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1answer
263 views

Free satellite data availability for moon [closed]

What are the satellite raster and vector data sets available for mapping the moon that can be freely downloaded? I need to know the availability and type of the data sets from which mineral mapping, ...
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3answers
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Finding municipal-level administrative boundary data for India? [duplicate]

Does anyone know how to find a shapefile with boundaries of Indian municipalities? I have tehsil boundaries as for year 2001, but I would like boundaries of municipalities and, ideally, also ...
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4answers
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Is there a free source of U.S. time zone borders?

I have a mapping app in which I need to display the borders between U.S. time zones. The easiest and most accurate way would be to feed in a list of lat/long coordinates representing the vertices of ...
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3answers
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How can I transfer data from one PostGIS database to another?

I have quite a bit of GIS data in a old PostGIS Database (version "1.1.6") and I need to transfer it to another PostGIS Database ("POSTGIS="1.5.3"). I tried creating a backup and restoring that on ...
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1answer
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Where can I find a Unesco World Heritage List as boundaries?

I was wondering if anyone knows where to find the UNESCO world heritage list with boundaries? I can extract point data from the json feed for the map on the website http://whc.unesco.org/en/list via ...
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Identify this state outline file

Some time back, I came across a site that was offering sets of US state outlines that were intended to be attractive/artistic rather than geographically accurate. I only have this copy of the outline ...
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Seeking Historical GIS datasets?

I've been looking for a while for Historical GIS datasets. In a lot of places (also in answers here at Stack Exchange), people are referring to a great dataset at ThinkQuest, which contains shapefiles ...
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3answers
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postprocessing GPS coordinates with RINEX data to improve precision?

Im doing some mapping for OSM in my region and I am curious if the precision of tracks from a GPS Receiver can be improved if they are post processed with RINEX data. The tracking is done with a ...
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1answer
295 views

Radio station coverage areas for the UK

In the US, the FCC (Federal Communications Commission) publishes transmitter data about TV and Radio stations, including information about their respective service area boundaries. Using the ...
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Data source for determining postal codes given location?

What is the best data source for determining international postal codes given a latitude & longitude?
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3answers
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spatial and spatiotemporal analyses

I have a dataset that consists of 247 mosquito traps placed in fixed positions and sampled weekly for 23 weeks. I also have dengue disease incidence data (indexed to home address) during the same time ...
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1answer
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Getting monthly weather means for future climates?

I am trying to generate spatially downscaled (5-10 arcminutes) future climate maps indicating monthly mean min and max temp, and precip. Most people usually need to extrapolate monthly data into ...
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1answer
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Seeking public database to input date and city to determine country at time and present-day?

I'm looking to automate a common task for us. For example, Jaromir Jagr was born in Kladno in 1972. I want to be able to take that and output a string. Born in Kladno, Czechoslovakia (present-day ...
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2answers
318 views

How to efficiently (programmatically) determine whether two datasets have / don't have identical content?

Given: a geodatabase A that contains 100 datasets named a1 .. a100 a geodatabase B that contains 100 datasets named b1 .. b100 I want to programmatically (*) determine for each dataset pair (ai, bi) ...
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1answer
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Cleaning GPS track data

I have data captured with a GPS tracking unit. Some track have bad/cold starts and the only way to determine the track quality is by using the altitude. Unfortunately I don't have the raw GPS data and ...
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Touristic poi-data (api or dump) with popularity measure? [closed]

I'm looking for freely available touristic (hotel, restaurants, bars, attractions, etc.) poi-data that have some measure of popularity. With popularity I mean, explicit popularity like on ...
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4answers
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Looking for geodata of Europe's major roads

As stated in the title, I'm currently looking for a shapefile/other geodata source of Europe's major roads (highways). If anybody knows a free datasource (or a possibility to extract that data from ...
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3answers
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Seeking urban area shapefiles for France, Germany and Belgium?

I'm trying to make a map like this for the Low Countries/Rhineland, where I basically show how spread out all the urban areas would be there if the urban areas had similar densities to American urban ...
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3answers
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Open source database of world locations [duplicate]

Possible Duplicate: Comprehensive list of Latitude and Longitude values of cities round the world i would like to know if is out there any downloadable database of world locations, i know there ...
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2answers
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Where to find shapefile basemap for the Indian Ocean?

I need to plot point data over a basemap of the Indian Ocean. Can anyone tell me where I can find such a basemap in shapefile format?
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North America Transit data

As far as I can tell, Google Maps does not release transit data or provide a transit API. Is there a one stop shop for transit Data: Transit stops Routes Fare hierarchy and schedule Ridership (...
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4answers
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Does the USDA SSURGO database have a web-based API that I can query?

Based on a previous question, Can I download the entire NRCS SSURGO database?, it appears that it is difficult to import the entire USDA SSURGO database. The Web Soil Survey provides the ability to ...
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4answers
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Site to download al USGS Topo Maps in bulk

I am trying to create seamless topomap WMS or TMS layer that covers the entire US (not interested in geo-pdfs). To do that, I need either the rasters (geo-tiffs, etc) or preferably vectors (whatever ...
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1answer
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Programmatically download (seamless) NED tiles?

I used to download 1/3 arcsecond elevation geotiffs from extract.cr.usgs.gov using web services. But a few days ago, that stopped working, probably because USGS reorganized their site. I tried ...
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2answers
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Sources of geolocated Tweets

Are there any publicly available sources of geolocated Tweets? I'm aware that one can collect them on their own, but was wondering if there is something readily available to play with. There is a ...
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4answers
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Does anyone have data or shapefiles for tidal flats, mangrove distribution, or salt marshes?

I am looking to map out the salt marshes, mangroves, and tidal flats of the world, but I am having difficulty finding data for this. Does anyone have any such data? This is for a research project at ...
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4answers
148 views

Identifying geographies that match certain climatic profiles through GIS

The long and short of this research is trying to find roads that lie within geographic areas that fit a given climatic profile. In this case, I need to find areas within the United States with ...
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2answers
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What is Google's source for topographic data?

I'm looking for as detailed as possible topographic data for a certain area and have found information displayed by Google Maps to be far more detailed than what is provided by 7.5 minute maps (from ...
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3answers
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Seeking API to return GeoJSON data for countries borders?

Is there a simple free REST API where I can send the name or code of a country and get in return geojson data which highlights it's borders ? I'm writing an application where I will have a changing ...
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5answers
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Are the Canadian National Topographic System (NTS) maps available freely online?

I'd really like a seamless service of the Canadian topo maps, similar to ArcGIS Online USA Topographic Maps, http://www.arcgis.com/home/item.html?id=4ee3622f0bfd41eea55ffa83aaf31a9f If there is no ...
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492 views

Using Creative Commons licenses for spatial data?

As more people and organizations are realizing the importance and benefits of publishing their data under an 'open' license, people are looking for the best license to apply. Creative Commons CC ...
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Shapefiles for U.S. Area Codes (NANP)

I have a bunch of telephone numbers (just the area codes), and I'd like to geolocate them and make a map, but I haven't had too much luck googling for shapefiles for Area Codes. Surely these are in ...
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3answers
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Is there hydrologically correct water-course data for Africa

I was wondering if there are any hydrologically correct river-channel data available for download for Africa? By hydrologically correct, I mean the topology should be correct. Connected river ...
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2answers
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Where can I find Population data for all UK Counties?

Where can I find population data (male, female, total) for all UK counties for last 7 decades, i.e. 1950,1960,1970,1980,1990,2000,2010. I tried my luck with Office for National Statistics and UK ...
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1answer
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Seeking elevation data for UK?

I'm looking for digital elevation data for UK. Does anybody know if there is a good service providing data for free that are of better accuracy than ASTER-DEM that is around 30m and, if not, what is ...
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4answers
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Automatic matching of two street networks

I'm faced with the problem of matching two street networks. I have these two differently sourced networks. The links in each network can be segmented, i.e. there is not necessarily a single whole link ...
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3answers
995 views

What format to use for highly compressed vector data?

Does anyone have information about possible formats for highly compressed vector data? Some basic requirements. Must be possible to read using the larger commercially available platforms. (ArcGIS, ...