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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7
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2answers
2k views

Looking for data sources for real road speeds

A data question really, though there may be a useful geo-processing solution. Context: I am calculating "drivetime" catchment areas using PgRouting and OSM / OSM2PO. If my employer/client is to ...
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1answer
660 views

Free open satellite or other remote sensing data for night time?

I usually work with daytime satellite images to do some image classification (mostly Landsat data from the USGS EarthExplorer). Right now I'd like to check at some night time images to work on city ...
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1answer
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Is there a downloadable data source for mapping out rivers with names for the whole world?

I'd like to be able to extract rivers with their names and the flow size (not direction) for the whole world. The scale I'll be drawing it at is about 2 centimeters per 10 real world km - nothing too ...
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1answer
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How to extract bounding boxes of cities from OSM?

For simple geocoding purposes I want to extract all cities from a single country of openstreetmap. They only queries I want to do are: ZipCode -> (List of) BoundingBox of City/Village City/...
7
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1answer
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NYC Subway Line Station Order?

I've currently got data on the NYC subway stations (including name, position, and how many people entered and existed during a timeframe). Also, I have the data on which stations have which train ...
7
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1answer
416 views

POSTGIS workflow for cleaning up a noisy dataset

I have a conservation dataset that im trying to simplify for the purpose of using it as a GML layer in openlayers, ie reducing the total shape and node count to quite small. The data has issues: eg- ...
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0answers
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Downloadable, Open Source, IP GeoLocation database

I have an open source project I need a similarly open source IP GeoLocation database for. i.e. IP address to country (and ideally city). Ideally with a license that allows redistribution. This is a ...
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3answers
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Saving project with data source path as relative in QGIS?

Is there an option in QGIS to save the project with the data source being a relative path? I don't see the option here. QGIS Wroclaw1.7.3
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5answers
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How to convert WKB to WKT?

how can i convert wkb to wkt form ... i stored coordinates in wkb but now can it will display to use in wkt form
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2answers
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Where can I download a free dataset containing major ports across the world?

I am working on an analysis and would like to incorporate major maritime ports from across the world. Some initial searching turned up a dataset produced by General Dynamics, however it will be ...
6
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4answers
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Seeking polygon shapefile of countries, states and islands?

As often happens, the hardest part of GIS is to come up with clean shapefile with an attribute table. I need to create a choropleth map, but all I have is this: Domicile,Captives New Zealand,24 ...
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3answers
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Obtaining *rendered* OSM data

I'd like to produce a simple walking map with some points of interest. Ideally, I'd like to use the rendered OSM data, as you can get from the page. Using the QGIS OSM plugin, I can only download a ...
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5answers
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Where can i find Latitude & Longitude data for the coastlines of the world?

Im developing an application to print flight paths on a world map. To do this i need a dataset to describe the latitude and longitude of various coastlines (and country borders if possible) of the ...
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3answers
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Source for UTM Zone File

I'm looking for a complete, freely available file showing UTM Grid zones. Preferably not a simplified version, but one that shows the full grid zones and all 'exceptions' (e.g. in Northern Europe) - ...
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1answer
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Seeking European City boundary data?

Does anyone know any sources for free European city boundary data?
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3answers
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Classifying point coordinates to countries or continents?

I have about 50 000 points (latitude and longitude), and I would like to find out in which country each of the points is located. It does not need to be super precise, though. (Or actually I only ...
6
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3answers
248 views

How to cite Geospatial Data that has been edited?

I used data from the Ordnance Survey for some maps I created. License information for the Ordnance Survey says to cite OS data like this: Contains Ordnance Survey data © Crown copyright and database ...
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4answers
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Where can I find a shapefile for the coastline of North America?

I am looking for a shapefile representing the coastlines of North America, such as something like this: http://www.diva-gis.org/gdata Does anyone have any suggestions?
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3answers
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Historical Hurricane Tracks

I have found a great source for historical hurricane data, but I can't seem to find a way to download the track information. It appears that you can only view the data on the website. I was ...
6
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3answers
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Import info from mdb file into a project?

I need to import info on a QGIS project. The info are in a MDB file (population, mean age, number of cars and so on: one record per region) that is written to be connected with a region shape from an ...
6
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1answer
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Help using the US American Community Survey Data

I want to use the USA American Community Survey Data for spatial analysis, but I'm having difficulty understanding how the survey tables are constructed so that I can relate them to block-group ...
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3answers
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Is there a DTM available for free somewhere?

To go a little bit further than the semantic question regarding DEM/DTM/DSM, I'd like to know if there is a free (of charges and use) DTM datasets? And what about resolution? As far as I know,only ...
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4answers
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Most timely source of California Fire Map data?

Fire season always has me scouring the web for satellite fire map information. Unfortunately many of the locations I find are outdated or not maintained well. What would be the best site to go to for ...
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2answers
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Where can I find some shapefiles of global climate/climatic zones

Have been looking around a bit for a shapefile/kml/etc file of global climatic zones (as listed here: https://en.wikipedia.org/wiki/Geographical_zone) -- temperature, subtropical, tropical, etcetera. ...
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3answers
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Is there a FTP to get Landsat images?

I need to automatically fetch Landsat images and for that it would be handy to access a ftp with images available. Does such ftp exist? Can I access it? Ultimately I want to get cloudless images.
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7answers
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Shapefile for India which includes Telangana (state)?

I need a shapefile for India which is up-to-date to display the regional borders. By up-to-date, I mean that it includes Telangana as a state. Many shapefiles that I downloaded do not have Telangana ...
6
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1answer
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What is the highest obtainable resolution of FREE elevation data in the UK?

I am seeking closure with this question guys. I am aware of various sources of free elevation data ~30+ m, and I have been searching for higher resolution FREE data for a while now. This already ...
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5answers
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Where can I find a shapefile of all the Montreal Neighborhoods?

I am trying to map out Montreal and was wondering if there is already an existing polygon shapefile of all the neighborhoods. Here is a link to a perfect example of what I am looking for. http://en....
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3answers
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where do I download POIs from Wikipedia? placeopedia used to have them but is now gone

I am trying to improve OpenStreetMap in Siem Reap, Cambodia. A way I am doing this is to add temple locations. I hear that there is a dataset of temple locations available from Wikipedia (presumably ...
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2answers
677 views

Looking for a live feed of tides in Australia

I'm looking for a feed of predicted tide heights and times, specifically for NSW, Australia. Tide sites such as the Bureau of Meteorology only provide static images of predicted tide height. NSW ...
6
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3answers
591 views

What kind of datasets are necessary for geomarketing applications?

If you would have to create a data base for geomarketing applications yourself, what kind of datasets would you purchase/collect? The first goal would be to find new store locations. Another would be ...
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3answers
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Download high res NDVI imagery

I'm trying to find a good source of NDVI imagery, but I'm struggling to find proper high res imagery, particularly for northern Europe. Does anyone have references to high res imagery, that is ...
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1answer
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Is there a simple interface from which I can extract average summer temperature and humidity for a list of latitude and longitudes?

I am interested in finding the summer average (either climatalogical mean or for a specific year) relative humidity and temperature for a set of globally distributed latitude and longitude coordinates....
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2answers
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Seeking “Official” delineation of North American mountain ranges?

I need to subset mosaics of remotely sourced data to the extents of several prominent North American mountain ranges, starting with the Sierra Nevada. After searching for the boundaries of the range ...
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4answers
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Is there a source for historical shapefiles of Europe in the modern era?

Is there a source for historical shapefiles of Europe in the modern era, i.e. starting ca. 1400? I know that "where can I find historic border data" questions were asked multiple times but I couldn't ...
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2answers
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Using the US census to analyze data nationally

I'm trying to make a table to relate the STFID and LOGRECNO values for the US 2000 census at the block group level, nationally. I realize that the LOGRECNO value is a state specific unique variable, ...
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2answers
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Locating shapefile of European railways for goods transportion?

We are trying to make a project about European goods trade so we need railway data in shapefile format. More specifically, we are trying to find the potential of mine products being exported from ...
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3answers
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Building cartograms using Web GIS?

I would like to build a cartogram map using Web GIS. I have a basemap and a set of raw data in excel. I wondered what are the steps to build up a cartogram map using Web GIS? Note: Originally ...
6
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1answer
290 views

What is the best way to store Flickr's Shapefiles Public Dataset in SQL Server 2008?

I'm wanting to import specific locations from the Flickr Shapefile Dataset into SQL Server would like to know what is the best way to store the data in SQL Server 2008? Link the the 1.0 Dataset: http:...
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3answers
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Scraping data from web maps?

I would like to scrape geodata off three websites, which prove quite difficult for me. https://www.aldi-suisse.ch/filialen/ - Here I would like to get all stores locations from the map. I checked all ...
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1answer
383 views

Fast data representation on the vector layers

I have found an interesting article about how HTML5 supports representation on large datasets. Article can be found here. In the article it is said that HTML5 and feature simplification can ...
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4answers
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Need a location based social network data set

I'm looking for a data-set of Geosocial network consisting of GPS trajectories, check-in, geotag contents and stuff like these available for research purposes. I'd really appreciate it if you can ...
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2answers
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Visualizing and organizing traffic flow data for an intersection

I'm looking for advice on how to organize data that describes traffic flows through several unconnected intersections over several years. I'd like to learn about the most basic representation of this ...
6
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1answer
567 views

Alps classified by SOIUSA

I am searching for a file in any geospatial vector format (Shape, ...) with the Alps classified by Suddivisione Orografica Internazionale Unificata del Sistema Alpino (SOIUSA) with the 36 sections and ...
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2answers
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Where can I get a WMS or WFS for near-real time Wind (atmospheric) data?

I've been looking for a good operational WMS or WFS free service to access near-real time atmospheric data in QGIS, namely wind vectors. I haven't found anything good yet.
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1answer
98 views

European road usage statistics per highway

I'm looking for an open data source which features the amount of cars per road per day or per year for Europe(!). I've found several national reports, which are only available as PDF and as such a not ...
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3answers
691 views

Web Mapping Services from Europe besides OSM [closed]

Wondering if there are any other Web Mapping Services based in Europe or even Asia? Fed up with the Bings and Googles and even OSMs of the WMS world. This is 2012 not 2002, shouldn't we have a much ...
6
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1answer
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Breakline detection algorithms for LiDAR dataset?

I'm searching for algorithms or open source tools I could use to detect breaklines from a LiDAR dataset; more specifically, from the terrain points of the dataset. At the moment the only thing I've ...
6
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1answer
109 views

What kind of high level semantic free GIS layers out there?

I'm looking for free GIS data that contains some high level information such as type of vegetation or type of soil or some other visual characteristics of the neighborhoods. I need more information ...
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3answers
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Residential tree cover for surveying?

Can someone point me in the direction of some high spatial resolution and reasonably recent satellite imagery for central Canada (Manitoba)? I am trying to determine whether I can generate accurate ...