Questions about obtaining data.

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1answer
213 views

Where can I find historical political affiliation data for the United States?

I am collaborating on a research paper where one of our variables is political affiliation across the United States. I will be creating a series of historical maps. I'm looking for the percentage of ...
0
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1answer
107 views

show dwg,as background not as vector

I have some dwg files that i need to show as background on my map, but the DWG is not need to be vector layers, i need only to show them with out the need of using. if i am trying to convert it to ...
0
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0answers
51 views

Which landmark to detect a CBD?

Anyone knows what shapefile (ArcGIS) available to detect a CBD (Central Business District), nationwide? Some use city hall as the landmark for a CBD. Is it applicable to use Courthouse? Where can I ...
2
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1answer
156 views

How does Google Maps know the location names?

How does Google Maps know the name of the very small shop in my street? How do they collect that kind of data?
0
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0answers
50 views

Vector grid out of range

I'm working with QGIS 1.8.0 trying to do some vector grid to a map. This shapefile (the original is a zip and has the following files .dbf, .prj, .sbn, .sbx, .shp, .shx) has some strange CRS and I ...
0
votes
1answer
48 views

Sampling from interpolated data layer

Im working with QGIS 1.8.0 and wanted to ask you how can I assign to each of the small squares of the map (I have the coordinates of the center each of them) values from an interpolated data layer as ...
3
votes
1answer
184 views

Divide shapefile

I'm new working with QGIS 1.8.0 and wanted to know if its possible to subdivide a map (shapefile, which is round-like) into small squares but following the outer round contour of the map? I tried with ...
1
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1answer
61 views

Source for all census tables available at each census geography/summary level

I'm familiar with using factfinder2 and generally know my way around census products. But one thing that I've never found is a document that has all the tables from major census products like the ...
0
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2answers
187 views

Cannot register a Feature dataset

I am having an issue trying to register a dataset, and being able to edit a featureclass within it. I am new to SDE so please bear with my explanation. I read online you cannot register a feature ...
1
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2answers
61 views

Can Facebook help show (statistics) how people move from place of living to place of work?

Maybe some of you guys know if you or FB can help, or who? Perhaps together with some University? I got this idea that FB probably holds quite a lot of location information on people (that are using ...
3
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1answer
427 views

Extract BoundingBox of Cities

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 ...
0
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1answer
89 views

Why is the CSVT file changing my real values to null?

I made a CSVT file to change desired real data to string data. After importing the original CSV file, that was linked by file name to the CSVT file, the string data appears as normal however all the ...
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3answers
48 views

Europe sub-national urban rates

Urban rate (the % of population living in urban areas) is a rather common demographic indicator, at nation-level resolution. I'm trying to locate sub-national urban rate data (NUTS level 2 to be ...
0
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0answers
18 views

Import attribute data? [duplicate]

I have a question that probably has a simple answer but I have not found it yet. Can anyone help? I have a shapefile of Germany's counties ("Landkreise"). Now I would like to add several attributes ...
3
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0answers
161 views

Where can I get free nautical route planner Data?

Please read - and understand - before closing; I do not yet have an answer. Thanks. I made a mistake. I phrased my original question so that it could be answered by recommending an application. It ...
3
votes
1answer
1k views

Good examples of interactive maps and associated technologies?

The display of maps and data within an interactive framework is becoming more prevalent online. I'm thinking beyond merely the ability to pan/zoom/control layers, but more along the lines of ...
14
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1answer
559 views

How to best model GPS tracks for storage, visualization and analysis?

I am thinking about writing software to deal with GPS Tracks and Waypoints (mostly storing, displaying and calculating metrics such as speed, grade, and some simple statistics). I wonder what should ...
1
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0answers
18 views

Algorithm to compile Lisiecki stack? (5MM-yr Temperature Record)

I have obtained the Lisiecki stack data from www.lorraine-lisiecki.com/stack.html How do I convert the d18O measurement into a figure for average surface temperature? What is the best algorithm? I ...
2
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1answer
392 views

European Mountains Shapefile Data Sources

I am trying to locate a GIS freely downloadable shapefile (preferably polygon) of European main mountain chains (not an elevation data), eg Alps, Carpathian Mountains. I tried variuos sources , ...
0
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1answer
74 views

Raster Data set Size on Disc (ArcGIS)

I have just converted a vector dataset of census tracts into a raster data set for an assignment. I can see the uncompressed size of the dataset in layer properties dialog box. But the assignment ...
0
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0answers
178 views

Census Demographic Data from DMA ID

How can I go about finding demographic data by DMA ID? Is there a data file I can download from somewhere that I can use to import into my web application?
18
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10answers
1k views

Common GIS data sources for developing nations. Where to start?

Not all countries have the benefit of funding/technologies for developing GIS data stores. I'm looking for a list of common GIS data sources that should be investigated when trying to build a good ...
0
votes
1answer
98 views

Is there a way to convert multiple columns at once from string to text, or to other data formats?

I have multiple data fields that need to be converted from string to text files. When I save them as "text" in excel or open office, they still load up as string files in QGIS. How can I convert more ...
2
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1answer
137 views

Does the Load Data function in ArcCatalog automatically re-project the data?

If I have a feature class within a dataset in one coordinate system and using the Load Data function, load that data into a feature class of a different dataset that's in a different coordinate system ...
2
votes
1answer
184 views

GDB maintenance of muliple editors without ArcSDE

I'm working with ArcGIS 10.1 SP1. I have finished 18 months of collecting data and digitization and built an impressive GDB with a lot of tables, relationship classes and 100 feature classes. Now i ...
2
votes
1answer
924 views

Indian city points and village boundaries

I am looking for Indian city/village points and village/Taluk boundaries for India. A perfect example what I am looking for is here for the State of Haryan, produce by Haryana Space Applications ...
1
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1answer
111 views

Exchange Boundaries and Wire Centers in France and Germany

I am attempting to find a shapefile of wire center service areas / telephone exchanges in France and Germany. Ideally, a point file showing the location of the actual equipment, coupled with a ...
0
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2answers
314 views

How do I filter unique values using a definition query on a File Geodatabase?

Is there a way to filter unique values only from a column in ArcMap using definition query? i.e to use a Definition Query to filter out just those values which occur only once. In a Personal ...
8
votes
2answers
191 views

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 ...
6
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3answers
3k views

Best source for high-resolution satellite images free/low-cost?

I am doing a household survey in Kenya, and I need to ensure that my survey team visits every house within a given area. I've been going to google maps and right-clicking on roofs to get coordinates ...
1
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1answer
59 views

Oceans Baseline Data

I am working on a volunteer project and we are in desperate need of a baseline layer. I have been unable to find it anywhere (there are plenty of shoreline and coastline layers out there) does anyone ...
4
votes
1answer
538 views

How to properly assign spatial reference to converted AutoCAD data?

I know this is a frequent problem, I myself confronted with this problem many times, yet somehow each Autocad dataset I received is different (although they're from the same area). To some data, the ...
5
votes
2answers
111 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 ...
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0answers
26 views

severe thunderstorms warnings dataset for europe

I'm looking at the possibility of using georef data on historic thunderstorms alerts. Does anyone know of a good (free ) source for this information? Thanks in advance
2
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2answers
482 views

Where can I get Beijing GIS data?

I was meandering so many places to find GIS data for Beijing. but it seems like I cannot get to any of useful resources. At least I got road, water shape files and outline of beijing city. ...
4
votes
3answers
74 views

What sources of granular wind data over the continental US are available?

I am looking for publicly or commercially available wind data at altitudes ranging from 0 feet to 40,000 feet over the continental United States. Which data sources should I look at? Which one is ...
3
votes
1answer
407 views

TMS or WMS source(s) for DEM data tiles?

I'm spinning my wheels trying to find an existing, free source for TMS or WMS elevation data that doesn't involve a long-winded clickabout or an emailed url. This question has a similar purpose, but ...
6
votes
2answers
2k views

Finding municipal-level administrative boundary data for India?

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 ...
2
votes
0answers
235 views

Geospatial Tools for SketchUp

I was wondering if anyone knows of geospatial tools that work in SketchUp? I know if GeoSketch, which allows a user to import ortho imagery, DEMs, shapefiles and GPS enabled photographs into SketchUp ...
3
votes
1answer
346 views

network coverage for mobile phones - europe

I am looking for GIS data with the network coverage (mobile phones). Something like the layer shown in the cell mapper website where I can select different countries and all the providers to export a ...
1
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2answers
138 views

Forest Coverage - European free GIS datasets

Where can I find GIS data for the Forest coverage for the entire Europe? Is there such a product available for free? I am looking for raster or vector (polygons) with the information of the % of ...
2
votes
1answer
135 views

Are the public domain vehicle tracks available?

I'm looking for recorded vehicle tracks that can be replayed to (load) test my application. Is there such data available? Best would be a european data basis but everything else would do the job as ...
0
votes
2answers
268 views

Why is QGIS reading in my CSV numeric data as string data, and how do I change it? [duplicate]

QGIS keeps reading in my numeric data from .csv files as string data. This means I have to figure out how to read it in with the proper data type, or convert it back to numeric inside of QGIS, ...
3
votes
2answers
152 views

Why is it so hard to download only a part of OSM data by attribute tag?

Is there any online service that allows to download only one thematic layer of the OSM data for a specific geographic region? For example all objects related to vegetation (trees, grassland,...), but ...
2
votes
5answers
473 views

Polygons for postcodes in Spain

Is there a source (free or paid) for polygons of border coordinates for spanish postcodes? Google show this borders in google maps, but doesn't provide them.
1
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3answers
612 views

export 3D data dxf file

I'm trying to export a DXF file from Qgis1.8.0 Lisboa and can not have a 3Dfile in Autocad! Or micristation. It results always in 2D file. How can I export height data from a shape file in Qgis? ...
1
vote
2answers
91 views

Where can I get public transportation locations for USA

I am trying to find a list of all public transportation/transit locations like subway stations, airports, bus terminals and bus stops for USA. Only major transit locations are required, rural bus ...
2
votes
4answers
2k views

How to read this data file and convert it to raster format for analysis?

I am trying to introduce the 5 degree dataset from here http://www.cru.uea.ac.uk/cru/data/precip/ (it is the first link). And once I introduce it to GIS to use it as a raster input to calculate zonal ...
0
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0answers
152 views

Where can I find annual temperature & relative humidity data of every town in India?

Need the historical data of temperature & relative humidity of a place called Bhiwadi in Rajasthan state of India
2
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2answers
233 views

Is there a source for leaf-off aerial imagery?

I am looking for leaf-off imagery for Oklahoma, Kansas and Texas. 1m leaf-off imagery would be ideal, although any substitute would be helpful. I need fairly high resolution imagery to distinguish ...