Questions about obtaining data.

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2
votes
0answers
108 views

How do I capture data from an OBD-II device?

So I happen to have a little bit of web experience, and have recently bought an OBD-II device. Basically, I'm trying to log certain metrics from the car, such as location and other diagnostics. I ...
4
votes
3answers
1k views

3D visualisation with open source GIS software [closed]

I'm searching for QGIS (or other open source GIS software) tools that can analyse XYZ data. Also I'm interested to hear about if anyone have migrated to non commercial software regarding geological ...
2
votes
2answers
133 views

Are there better climate data than Worldclim for Europe?

I am looking for the best available climate data in Europe. Worldclim seems to be the best source of information for global data, but I am wondering if there is a higher resolution (better than 1km ...
19
votes
3answers
543 views

How can we protect GIS data?

I have found a very interesting paper here related to this topic. I just want to have views/ideas from other professional about how we can protect GIS data using Cryptography or Digital Watermarking? ...
2
votes
1answer
79 views

Handle a great amount of Markers with OpenLayers

My general Problem is to maintain a lot of markers. For the beginning I want to display all Bus Stops of Berlin, Germany and surroundings as Markers. I already got that I have to use a strategy like ...
2
votes
2answers
2k views

US unemployment data by zip (or aggregating data up to county level)

I am trying to find unemployment rate data for the US that is: at 5 digit zip code level monthly, or quarterly, or even annually, for 2008-2012 free That seems to be impossible as far as I can ...
2
votes
1answer
114 views

How to make icon marker size variable depending on data value using CartoDB?

Is there any way in CartoDB where I can make the size of individual icon markers, visualized on a CartoDB map, variable and set according to its data value in a given data range? Similar to the ...
-1
votes
1answer
83 views

Extracting area with a range of lat long?

Is there any online tool to extract a certain area with a range of lat long? I'd like to overlay some locations on a map. To do so, I need a map whose range is specified so that I can determine the ...
8
votes
2answers
324 views

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 ...
2
votes
1answer
378 views

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 ...
1
vote
1answer
113 views

Help me to visualize polygon and point data [closed]

As part of pilot project, we have collected basic/rudimentary Household survey in one district. We have both Polygon and point data.Attributes of the database include, No of people living in the ...
3
votes
2answers
103 views

Why can't I open a .xls with QGIS in OSX?

I'm trying to open an .xlswith QGIS 1.8 in a Mac, I'm loading the vector layer from Add new vector layeretc. etc. the procedure works in Windows but not in Mac where I have an error Invalid source ...
1
vote
0answers
19 views

Similar paths to Compare [duplicate]

I want to implement a mechanism to compare similar / identical paths. For example, a person who makes the trip home - work every day, be able to detect these paths and create groups to compare ...
2
votes
1answer
2k views

How to get Openlayers cluster strategy work for large data?

The map Layer has around 1500 points. I am able to display all the points in the map without any problem but adding the cluster strategy to the layer does not work. The Cluster strategy functions when ...
1
vote
1answer
62 views

Retrieving lost data from QGIS

I'm trying to help a friend retrieving QGIS data from a formatted drive. Finding the .qgs project that was saved on the desktop is no problem, but it seems that there is no actual data located in ...
0
votes
0answers
32 views

Interactive computation of spatial data on a web-map

All the GIS area is very new to me so I would like to ask about a guidance of my next steps. This is the web-map I would like to make (if it is possible): Lets consider the following map: . Each ...
-3
votes
3answers
848 views

The list of geocodes of villages/cities of India wanted

Any relevant information is welcome. For example, license of the data, where I can find relevant sources, etc.
13
votes
10answers
14k views

Where can I obtain an up-to-date list of US ZIP Codes with Latitude and Longitude Geocodes?

NOTE: This began as a question on Stack Overflow, which has subsequently been closed. I also noticed a similar question about Most Up-To-Date Source for US Zip Code Boundaries, but I believe this ...
0
votes
0answers
22 views

Where to download shapefile of 2km Tetrad squares for UK? [duplicate]

does anyone know where I can download a shapefile of 2km Tetrad squares for the UK please? A google search wasn't very helpful so I thought I'd try here. A Tetrad is derived from the British ...
10
votes
7answers
8k views

Where can I find a shapefile of city boundaries in the US?

Where can I find a shapefile that contains boundaries for the major cities in the United States? I have tried the census website but could not find anything.
2
votes
2answers
111 views

Field Calculator, Conditional

I am trying to assign Value from one field of my Attribute table to a new field based on the 3d field.... The Code Block I am thinking about as follows: *def conditional (!FarmCateg!): if ...
0
votes
0answers
97 views

Does anyone know of Electric Company Boundary Shape files that are out there for Free?

Ohio has a great website for their Electric Service Commission and I am looking for a shape file or data that would get me the service boundaries of electric companies for other states. EIA has data ...
4
votes
4answers
495 views

How to test whether two countries are adjacent?

I have an interesting question: Is there a dataset by which I can use to test whether two countries are adjacent? For example, if inputs are Mexico and U.S., they are adjacent; if inputs are England ...
1
vote
0answers
29 views

Global address datasets for testing?

Are there any free global address datasets I can use to test my geocoding application? I'm looking for a dataset that contains residential addresses from countries around the world. I don't need a ...
2
votes
1answer
445 views

How to pick the coefficient in Inverse Distance Weighted method?

I'm using QGIS 1.8.0 to interpolate weather data. This is, I have a weather station located in say, A and C. With the Inverted Distance Weighting or Triangular Interpolation methods, I can ...
7
votes
4answers
2k views

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 ...
1
vote
2answers
41 views

Linking data to road colour scheme

I'm getting started with a qgis map showing the quality of roads in my town. I have various data which create an index of 1-5. How do I link this index data to road data in a map, showing the bad ...
3
votes
1answer
88 views

Best place to download or purchase shapefiles for Louisiana Parish?

I am looking for shapefiles to either download or purchase for the BEAUREGARD Parish in Louisiana. I have been able to find files for the Townships and Sections but I am in desperate need of a ...
2
votes
2answers
222 views

Shapefiles for US city and Zip level

I already have the information for US states and Counties. I have the information in the Json files. I want the information for ALL US city and Zip Code information. Any leads appreciated. I cant ...
2
votes
4answers
104 views

Is there any free resource to get international raster data (other than USGS)?

I am looking for any raster database that allows free downloads of any kind of raster data pertaining to Damascus, Syria and the surrounding Turkey area. I'm trying to avoid USGS since it requires a ...
-3
votes
1answer
112 views

Where can I find GIS data for the range of coast redwood?

Editor note: This question has been heavily edited in order to make it on-topic. Where can I find GIS data showing where coast redwood trees (such as the one in the photo below from the 1800s) exist ...
1
vote
0answers
101 views

Exporting basemap in ArcMap, similiar to export a dataset

I am trying to export the basemap in ArcMap to use it with my mosaic dataset. I need these 2 to import and work with in Unity 3D. When I am exporting my mosaic dataset consisting of DEM files, I can ...
3
votes
3answers
75 views

Looking for East Africa datasets

I’m working on some maps for the region, and assessing available datasets. So far I have found a few sites with interesting data, but not many. Does anyone have any suggestions about where I could ...
7
votes
1answer
3k views

Looking for ZIP+4 boundaries

I know where to find 5-digit ZIP code boundaries. Do 9-digit ZIP code boundaries exist? If so, where might I find them?
4
votes
2answers
255 views

Is there website with list of common QA/QC errors?

As I am working on reviewing my soils spatial data, and I am doing my QA/QC I placed a point layer to check for errors. I add the field column to mark the error and state the error. I recently ...
9
votes
5answers
1k views

Looking for USDA plant hardiness zone shape file

given that this is a USDA resource I really thought that it would be available online somewhere, but for the life of me I cannot find a shape file for the USDA plant hardiness zones anywhere. anyone ...
2
votes
2answers
304 views

Retrieve data from MongoDB in OpenLayers

I wonder if it's possible to retrieve "directly" data from MongoDB to display them in an OpenLayers Map ? Maybe using some sort of API ? If you know more about this, or if you think it's a stupid ...
1
vote
0answers
28 views

Dense data set of locations for flow analysis

I want to do some analysis on real world data related to crowd flows and now I am looking for a publicly available (or at least available to academia) data set of trackings in a crowd. The data set ...
0
votes
1answer
41 views

Data about administrative subdivisions capital cities

I am looking for data about second or third rank administrative capitals in every African country (the administrative center of a country territorial subdivision), but I can't find anything close to ...
0
votes
0answers
48 views

Combining two separate shapefiles with undefined projections out of Leica

So this is a mess. When the software outputs I have two shapefiles. The projections aren't defined, but I know one is WGS84 and the other is NAD 83. The NAD 83 includes northing easting and ...
4
votes
1answer
96 views

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 ...
1
vote
1answer
446 views

Administrative level and coordinates from Yahoo GeoPlanet WOEID

The Yahoo GeoPlanet data can be freely downloaded from: http://developer.yahoo.com/geo/geoplanet/data/. If I understand it correctly, each WOEID corresponds to a unique location on earth, with ...
3
votes
4answers
193 views

High resolution and high detail vector GIS coastline product needed

What is the absolute best vector GIS coastline product available globally? I know of a great product for Africa (page 13 of this PDF ...
0
votes
2answers
33 views

Migrating several shapefiles from one server to another?

my organization is a large ESRI user and we are under going some hardware changes. My question is: Is there a way to move several shapefiles scattered across many folders (in one server) to another, ...
1
vote
2answers
108 views

World Land Cover data

I need to get land cover data for the entire world. I'm using corine land cover data for Europe: http://www.eea.europa.eu/data-and-maps/data/clc-2006-vector-data-version-2 but I have no idea how to ...
0
votes
2answers
77 views

looking for free shapefiles, communications and water infrastructures

im looking for communications layers shp format, covering all middle east. anything free? thanks also im looking for water bodies, rivers, anything related to water in the same area. any suggestions? ...
0
votes
1answer
65 views

US Voting precinct data

I am looking for a source for data to determine voting precinct boundaries in the United States. My thought is that they might be on the Census website but under a name that doesn't make it obvious. ...
3
votes
1answer
258 views

Delete single raster from Raster Dataset

Is there any possibility to delete single raster previously loaded to a Raster Dataset?
1
vote
1answer
395 views

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 ...
0
votes
0answers
30 views

Where to download US zipcode polygons? [duplicate]

I need US zipcode areas (polygons) for a web map implementation. Can you tell me where to find it (free or paid)? Thanks!