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.

Filter by
Sorted by
Tagged with
6
votes
1answer
2k views

Russian GIS Data

Which companies are the best suppliers of vector, geocoding, imagery, and POI data in Russia? Which companies provide a complete service (which includes the above data types and also routing, ...
6
votes
1answer
1k views

Planetary-scale computing architectures for electronic trading: where is the data?

In his intriguing TED Talk, How algorithms shape our world, Kevin Slavin shows this map from "Planetary-scale computing architectures for electronic trading" ... does anyone know if this data is ...
6
votes
1answer
158 views

Data Feed for Space Weather / Aurora

I am building a map application for a northerly area and would love to bring in a feed of northern lights prediction/probability (like below). http://www.gi.alaska.edu/AuroraForecast Does anyone ...
6
votes
1answer
545 views

GIS storage format for better performance - Android device

We have developed an android application which loads different eco-zones and does geo-fencing based on current GPS location. We have converted a shapefile to KML, then to JSON format, for loading in ...
5
votes
5answers
380 views

What is the best way to protect data online?

What techniques do people use when protecting data (e.g., preventing a user downloading the whole dataset) they are overlaying on top of Google/Yahoo/Bing etc.?
5
votes
4answers
3k views

Now that NationalAtlas.Gov is retired/removed, where is the largest source of public shapefiles for the USA?

I used nationalatlas.gov for many years, downloading various shapefiles regarding water, roads, boundaries, environmental factors, and more. NationalAtlas.gov was a central public site that many GIS ...
5
votes
2answers
318 views

Worldwide population density data not grouped by country?

Are there any data sources available, preferably freely (but not necessarily), which show population density without regard to country or constituency boundaries of any sort? I'd like to analyze a ...
5
votes
3answers
338 views

Download MODIS data for Mexico

I would like to download MODIS npp images for Mexico but I cannot figure out which files correspond to the country. How can I associate each tile to its location without looking at the million of ...
5
votes
5answers
1k views

Provincial Base Mapping Data Sources in Canada

I'm very familiar with the Ontario Base Mapping Data, and am looking for similar data for other Canadian Provinces. Perhaps we can start a list of resources here? I'm looking for something at a larger ...
5
votes
2answers
2k views

Data organization strategies for .csv and .shp

I'm organizing a large amount of data for a project and the data is stored in .csv format, with a code to relate each row to a polygon in a .shp. I was planning on converting the .csv data into .dbf ...
5
votes
5answers
2k views

How do I locate cities or town polygon shapefiles?

Does anyone know of a reliable source where to download city/town polygon shapefiles? I'm specifically looking for NY and NJ. I have come across point shapefiles, but not polygon. For example in NY ...
5
votes
3answers
3k views

Seeking location of all Universities and Colleges in North America?

This seems fairly straightforward but I'm having trouble finding the right data. All I need is the name, address, and lat long of all universities and colleges in North America. I've come across a ...
5
votes
4answers
2k views

Global solar radiation data

I need a solar radiation data in central Asia. Is there any global dataset of solar radiation? If someone know about it, please send to me the link.
5
votes
3answers
3k views

Does a national(USA) interstate rest stop/rest area dataset exist?

And I don't care about format--worry about that later! I found some maps in Google maps, usually per state. I also have one map made my someone else, that no longer appears in the Google Maps search ...
5
votes
3answers
15k views

Is it possible to export data from google maps?

I plan to create a map using food-restaurant locations in Manhattan, NY. Since there is a large quantity of densely located restaurants it would be a pain to collect it by hand. Is it possible to ...
5
votes
3answers
1k views

Where can I find Colombia municipality geometries?

I'm looking for shapefiles (or some similar format) of Colombia's municipality boundaries. Wikipedia has a map that seems to be correct and which matches another dataset that I will eventually be ...
5
votes
3answers
3k views

Where can I find Road shapefile/e00/etc for the entire world?

I am hoping that there is a single source for this data, ie. 1 geodatabase. If not, can someone point me towards the sources that would make up the entire world's road transportation network? I have ...
5
votes
1answer
899 views

Coordinates of cities and villages in The Gambia/Senegal

I am looking for sources of geo-referenced data on villages and cities (or all other things there are) in The Gambia (and Senegal if available). One issue with geocoding in rural West Afrika is the ...
5
votes
1answer
4k views

Getting a list of zip codes with its adjacent zip codes

I need a list in the form of adjacency list that contains all zip codes in the United States that each has a list of adjacent zip codes. I tried searching for it on the internet. Many of them only ...
5
votes
1answer
1k views

Is there a free dataset of historical geocoordinates of ancient cities and places?

Is there a freely available dataset (csv, geojson, topojson, etc.) with geocoordinates of ancient cities, for example of the Roman Empire? Ideally with additional information like population size? I'...
5
votes
2answers
35k views

Adding points to point vector layer using QGIS?

I have a point layer with multiple data points in QGIS, but I want to add some extra data points to it and adjust some info that we missed because the ground was wet and we needed to go around it. I ...
5
votes
1answer
2k views

Where can I download Yahoo's Geoplanet Data?

I was trying to Download the Yahoo Geoplanet Data, so that my application does not have a dependency on the API provided by Yahoo. When I go to the download link, I see the following message: We ...
5
votes
3answers
135 views

Where can I find information concerning rivers?

I'm looking for information I can visualize in Google Earth concerning rivers, such as rapids, put-in points, take-out points, campsites, etc. Any idea how I can look for this kind of information?
5
votes
2answers
298 views

How to deal with multitype data sources in QGIS?

Today I was trying to import a DXF to Qgis, the result is that qgis displays everything LINES and POINTS but it only displays options for the POINT objects. When I try to export to a shapefile, it ...
5
votes
2answers
6k views

Seeking USA electric transmission powerlines as shapefiles?

Does anyone have a good source for USA electric transmission powerlines as shapefiles? I have some old (1993) data from the US National Renewable Energy Laboratory (NREL) and Cubewerx' WMS (Cubewerx ...
5
votes
2answers
14k views

Get a list of all countries and their states?

I'm searching for a data set that contains the country information (Name, ISO 2 char, ISO 3 char, ISO number, ...) and other data. Also I'm looking for all states for each country including their ...
5
votes
2answers
235 views

How can I retrieve a list of the most used GIS software?

I would like to know how many user use a GIS software and compile a list of the most used GIS software. I thought to use the download counter of the sites but this is quite inaccurate how can I ...
5
votes
1answer
370 views

Creating geodata service from version other than DEFAULT in ArcGIS for Server?

This is with ArcGIS for Server and Desktop 10.1 I want to host a geodata service, but I don't want it to be from the DEFAULT version. I want it to be from an alternate version, that I can check the ...
5
votes
1answer
123 views

How is the legal situation for edited maps?

I am currently working on a commercial GIS project and have a lot of uncertainties regarding legal situations and terms of use for different maps. For example, the data of eurostat does not allow a ...
5
votes
3answers
658 views

In what data format should I export a (lat,long,alt) or (x,y,z) grid to be compatible with the largest number of GIS software?

I am new to GIS and developing an application that generates a 3D grid with (latitude, longitude, elevation) or (x, y, z) metric triplets, and I would like to add an exporting feature that ensures ...
5
votes
2answers
7k views

Free data with good accuracy of Europe and Mediterranean

I'm searching for free data like Europe's coastline and Mediterranean island's names etc. but with good precision. I found some shp file from this site http://www.naturalearthdata.com/downloads/ but ...
5
votes
2answers
3k views

Free dataset of world cities, including city geometry

I am looking for a free dataset of world cities. I checked all the datasets suggested in the question : Is a Country/State/City Database available?, but couldn't find one where the city location is ...
5
votes
2answers
579 views

Data ETL workflow optimization

I have a legacy workflow that I would like to optimize and automate (at least partially). The current workflow goes like this. I receive a MS Access .mdb file containing a single table. This table ...
5
votes
2answers
3k views

Are there any sources of UK building footprint data available?

I noticed that there's another question related to this topic, but the question was related to US data. I'm looking at the possibility of producing an interactive map for a UK based city, which ...
5
votes
2answers
2k views

Extracting Derived Z-coordinate data

I am trying to extract the z coordinate value from the derived attributes, similar to How to re-calculate area, perim, p2a,width and length in QGIS? but I cannot see a dedicated operator for finding ...
5
votes
1answer
410 views

(X,Y,Z) Coordinate tracking in QGIS

I am working on a Python script which will give me the x,y and depth coordinates in QGIS. I have depth as an attribute of the raster layer. My objective is to get a status bar which shows x,y and the ...
5
votes
2answers
189 views

How can I constrain this filtering even more?

I'm using QGIS and I am trying to filter a dataset using the advanced filter. My dataset contains earthquakes in the U.S., Canada and Mexico, however I would like to exclude Canada & Mexico for ...
5
votes
2answers
782 views

Looking for global river datasets more detailed than Natural Earth data

Does anyone know of any large scale datasets for rivers that are higher resolution than the natural earth data? I've been looking at the digital chart of the world, and that appears to be down/...
5
votes
2answers
263 views

Location data for Nuclear Power stations in France

As it says on the title, does anyone know a place I can look at and/or download location data for Nuclear power installations in France? I believe it is well known data, but I cannot find it anywhere....
5
votes
2answers
590 views

Using SSURGO data without MS Access?

I'm building a GIS for a large-scale family farm. We don't have a lot of resources to devote to this, as it's a new part of the farming operation and therefore viewed with some reserved skepticism. ...
5
votes
5answers
28k views

Seeking API for Countries, States, Cities and Airports? [closed]

I'm looking for an API or data source (or multiple sources) that provide the following information: Countries Information: ISO code, Region, Capital, population, languages, currencies and climate. ...
5
votes
1answer
3k views

Where to download Mars DEMs and landcover?

I'm looking on the websites of the Mars Global Surveyor and the NASA sites, but all of the data is in jpeg or img form. Does anyone know where to find useful raster data sets for elevation and land ...
5
votes
4answers
8k views

How can I find GPS coordinates of the geographic center of US counties?

How can I find a list of the GPS coordinates of the geographic center of each US county?
5
votes
1answer
904 views

How to convert a column of numeric IDs to letters?

I'm working with qgis 1.8.0. I divided a map into 500 features (small rectangles), and now I have the doubt if there is any way to change the ID of the attributes from numbers to letters? When I did ...
5
votes
2answers
313 views

Any Piri Reis shapefiles?

Incredible claims have been made about a map named after its creator (Piri Reis). I was looking into digitizing the map and overlaying it with a modern map of the world, specifically the east coast ...
5
votes
1answer
169 views

Vehicle travel data for the USA

I'm looking for vehicle travel data in the USA - at any spatial resolution smaller than the unit of a state, and ideally at a city level. I'm interested in daily, or weekly data and also any ...
5
votes
2answers
584 views

Available US State or National business (or employer) database lists?

This question dovetails with this post on geomarketing applications. I am familiar with some of larger, paid-for business registry's like InfoUSA and Dunn & Bradstreet. While the detailed ...
5
votes
1answer
414 views

Adding ArcGIS Online vector tile service in Leaflet map?

I am trying to add an arcgis online served vector tiles service to a Leaflet map. I am using ( https://github.com/Leaflet/Leaflet.VectorGrid ) to add the vector tiles to a Leaflet v1.3.1 map ...
5
votes
1answer
831 views

LiDAR dataset which is benchmarking for testing classification algorithms?

Is there a publicly available benchmarking database of classified (labeled) LiDAR data? For example, where each point is classified as ground, vegetation, building, road, water, etc? The point clouds ...
5
votes
1answer
339 views

Using remote sensing satellite for chlorophyll mapping?

Location of my research are reservoirs which have an area of 47 and 62 km2. I need a better image resolution than Landsat(Pan).