Tagged Questions

Questions about obtaining data.

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0
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0answers
3 views

Is it possible using JavaScript and cartodb.js to get the layer's total amount of visible data in a certain moment?

I am working with a torque layer and I would like to know for each moment the amount of data points shown in the visualization.
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0answers
13 views

Optimized interpolation method with fixed-location sample data points?

I'm trying to find an optimized spatial interpolation method that deals with fixed-location sample data points. Say if I have fixed-location sampling sites and collect data daily, and then use these ...
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2answers
27 views

Worldwide High-Resolution Water Body Shapefiles with Consistent Scale

Where from your website can I access worldwide vector water body shapefiles that have better resolution than the generic SRTM 90m data? Do you have coastlines and inland features (lakes, estuaries, ...
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4answers
569 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 ...
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2answers
43 views

Find Healthcare Data by Geography and Income Level

Is anybody aware of a data source for healthcare related data (number of people covered, type, etc.) for any geography (looking for USA) that can also be broken down by income level? I've tried ...
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2answers
104 views

How do I convert a tweet into a point in QGIS?

I've been doing some research on using R to datamine twitter, but I haven't really found an answer or a decent tutorial for my question. I'm interested in pulling tweets from twitter with a certain ...
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1answer
19 views

How to join the shape to an external data

I'm developing an application that uses Shapes only to draw the map. I would like to "Inject" the data at the time of viewing, since my data is dynamically changing. Anyone know of any way of doing ...
2
votes
1answer
37 views

Polygon files corresponding to Russian Census

My team is using the 2010 Russian Census and we'd like to have polygons that correspond to these population values. We're flexible to any sort of polygon format (shapefiles, GeoJSON, KML, etc). ...
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0answers
36 views

Looking for a data source for all villages, towns and cities in the world

So, I've been working with Geonames data dumps, but I am finding that they are either not complete enough (cities > 1,000 population), or too complete. Here's an example of being too complete: ...
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2answers
78 views

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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0answers
26 views

Finding political party affiliation data for the US

My ideal find would be party registration or affiliation down to the household, Congressional district, block, block group or Zip code level for the whole country. I've been sniffing around for a ...
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3answers
46 views

How to sum all values with the same ID in ArcGIS Desktop? [duplicate]

I did a one to many spatial join and ended up with an attribute table as follows: Lets say we have 5 different IDs that have numerical values in 500 rows. I need to sum the values for each ID, and end ...
4
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3answers
348 views

Free radar (SAR) satellite data

I'm looking for free (non-commercial use) sources of radar (SAR) satellite imagery. Does anyone know of sources?
4
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1answer
97 views

Highest resolution Digital Elevation Model for the UK?

I need the most precise and highest resolution free digital elevation model for the UK. Would OS terrain 50 or ASTER GDEM be more suitable for view shed analysis?
3
votes
1answer
22 views

extracting geographic location from NOAA NARR grib

I've downloaded a NOAA NARR grib file that I want to extract the wind component as well as the geographic location. I'm able to extract the wind component from the grib but I can't seem to find any ...
1
vote
1answer
354 views

Why use a database when you can have all of your data in javascript/openlayers?

I have a really simple and basic question. First of all, I have to mention that I am pretty new to web applications and GIS. I am working on a web application using Openlayers, Postgresql/postGIS and ...
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0answers
12 views

Looking for Offshore Wind data for Puerto Rico and the USVI

NREL seems the obvious provider for such data but the NREL data download page only provides onshore wind data for this area. NREL even has an offshore wind energy map image for Puerto Rico and ...
3
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0answers
23 views

Lake Victoria bathymetric data

I am trying to find bathymetry for Lake Victoria (or portions). Any GIS format and almost any resolution will do. As a last resort a hydrographic chart will suffice.
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0answers
12 views

New York Vision Zero Data

I'm trying to open Vision Zero Data provided by NYC, but they've not provided any documentation or guidance. Does anyone have any guidance? I'm ideally looking for such data in a CVS/excel type ...
2
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1answer
19 views

Sourcing Historical Wind data?

I'm looking for a service that provides hourly historical data for 24h and back. I am currently interfacing openweathermap.org but had to find out that not all stations provide this feature. Are ...
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0answers
16 views

2.4.0-Chugiak PostgreSQL layer subset causes DB error

I have succesfully connected to pgsql layer. I got an error after trying to define feature subset in query builder. Can anybody help with this error? An error occurred when executing the query. ...
3
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2answers
44 views

What are the types of bus routes data, which are made available from Open Street Map (OSM)?

With regards to bus routes, what are the types of data which are made available for download. Is it possible to export a region's bus routes in open street map (OSM) or GIS data format?
2
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1answer
44 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 ...
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0answers
46 views

Where do I find official summit elevations found on USGS topo maps?

I'm creating topo maps for my day hikes guides for national parks. I've already done one for Glacier National Park. When I was working on summits, I downloaded the data for Montana from GNIS and when ...
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1answer
40 views

Where to download shapefiles of interest for Honduras

Where can I download free Shapefile data for Honduras including: roads departments municipalities points of interest
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4answers
106 views

Looking for London postcode to area mapping data

I am looking for London postcode to area mapping data. I have reviewed several databases and API's and most resolve a postcode to at best a district and a ward, which doesn't correspond to the ...
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vote
1answer
34 views

Looking for a complete list of cities by state, with area code

Our company is working on moving our sales assignments from area codes to ZIP codes, and we need some kind of dataset to help move existing assignments to the new system. Does anyone here know where ...
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1answer
26 views

A Tool for Mapping Metropolitan Statistical Areas (MSAs) to Addresses

My and team and I ran a series of zip codes from addresses within our data set against MSA to Zip Code data found on The Census' website here. We found that a relatively high number of the addresses ...
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1answer
124 views

Is cost of new LiDAR data reasonable for deliverables provided (in Canada)?

My organization is considering hiring a company to capture new LiDAR data to help with current storm water issues that we are currently experiencing. I am a GIS analyst that has been assigned with ...
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3answers
75 views

How to get shapefiles or kml files for city map in India?

I am doing a project. In that I'm using QGIS for visualization purpose. Using the OpenLayers plug-in i am getting map of a city. What i want to know is whether I can convert that into shapefiles ...
3
votes
1answer
39 views

Trimble GPS data is not displaying in ArcMap attribute table

I am currently having difficulty trouble shooting a problem. While using a TRIMBLE GEOXH (GeoExplorer 2008 Series) I have the problem of missing data after exporting it to ArcMap from my GPS receiver. ...
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1answer
65 views

Exonyms dataset

Does anybody know some Exonyms dataset? What I would like to find is a list of Europe cities/toponyms in different languages where all the cities refer to the same. Example: London, Londra, Londres, ...
2
votes
1answer
35 views

How to convert tif to dep extension?

In white box when i try to import or do any processes it's asking .dep extension How can i convert .tif into .dep extension?? If try to pass LISS3 data in GRASS GIS it is taking as single bands. So i ...
4
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2answers
369 views

Where can I get land-use data for Nigeria?

Anybody knows websites of land use for the Federal Republic of Nigeria? Free or paid. I am looking for the states of Kogi and Anambra.
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0answers
56 views

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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0answers
19 views

Is there an api for world terrain/biome data?

I'm looking for an api where I pass a lat/lng, and get "Desert" or "Mountains" or "Ocean" back. Just the general biome of the area. Most of what I've seen involves getting tiles back, so you can ...
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0answers
31 views

Where to find spatial-temporal data? [closed]

I am an italian student, and I'm looking for a particular dataset. I'm interested in a model for spatial regression, with time-varying data. I'm looking for data with coordinates, measured in ...
1
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0answers
18 views

Where is it possible to download a DEM for the Romanian east carpathians? [duplicate]

I'm quite new to GIS and have only done a few small tasks for Projects at University and the required data has always been provided. I am now struggling to find the specific DEM I need. Also other ...
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1answer
45 views

Superimposing high resolution NetCDF data on Google Earth?

I have got output from Weather Research Forecasting Software(WRF) in NETCDF format. These are basically high resolution forecasts for precipitation and wind barbs(sea breeze circulations or slope ...
4
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3answers
48 views

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 ...
1
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0answers
34 views

Data extract widget - Flex

I have successfully created a data extract widget. It works great. I would now like to be able to set a limit say of 5000sqm or something. I have seen other sites do this. They have a message pop up ...
3
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2answers
89 views

Basic question about downloading SRTM 3 arc resolution data

I want to be able to download high resolution 3 arc degree resolution (90 meters) from NASA's earthexplorer.gov site. However it is a bit confusing for a beginner like myself. I want to be able to do ...
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2answers
112 views

Where/how to find ortophotos

I am very new to Geographic Information Systems. I have a very basic inquery; How do I get hold of the newest ortophoto of South Africa to use as a background map for my GPS data? I'm using QGIS but I ...
3
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3answers
46 views

Is there a way to shift data in an attribute table so that all attributes are moved to a different coordinate?

I have several shapefiles where the attribute table is composed of timestamped data that is appended to the coordinates. Because of the nature of my data, I need to apply a time lag so that the data ...
2
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4answers
138 views

Shapefiles of Central America and Mexico coastlines?

Does anybody know/has a shapefile of Central America + Mexico (WSG84) (with no administrative boundaries) at a low resolution that could share with me? I'm looking for a very simple shapefile without ...
1
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1answer
46 views

What type of data is available at the “census block” level? [duplicate]

I'm curious what is available at the 'Census Block' level, the finest scale. I found this dataset: http://www2.census.gov/geo/tiger/TIGER2010/TABBLOCK/2010/ It contains HOUSING10 and POP10, ...
1
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1answer
55 views

Where could I download Income data at the Block Group level… census data [duplicate]

Where could I download Income data at the Block Group level, actually I'm not sure where or how to download it at the tract level either. I would be interested in the most recent data that is ...
2
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1answer
22 views

Finding DEM/HIllshade sources California

Creating watershed maps for schools. I want to color ramp the elevation to show low and high points. What kind of files do I need and where to find them?
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1answer
42 views

Easy Guide to ESA satellite data?

Can anybody provide user friendly guidance to ESA datasets? What is available? When will new stuff be available? I struggle to work out what might be interesting amongst the many websites and their ...
2
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1answer
48 views

Where can I find official Land Use/Land Cover GIS data for Ecuador?

Right now I'm specifically looking for Land Use/Land Cover data but things like roads and soils would be handy in the future as well. In the U.S. my source for nationwide LULC data would be the ...