Questions about obtaining data.

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1answer
89 views

How to document field properties of attribute in shapefile?

I would like to document within ArcGIS how the values for specific shapefile attribute fields were derived or obtained. Is it possible to input and export this information as a report with ArcGIS 10? ...
0
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1answer
48 views

Where can I find human migration data? [closed]

I am looking for data to create a flow map. I need data showing the migration of people either within a country, or internationally.
0
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1answer
212 views

QGIS 2.0 Howto copy raster data from a QgsRasterDataProvider to an OpenCV matrix

I'm hacking the half day arround a problem and that I' thought it was simple one. I'm using C++ (QtCreator) QGIS 2.0 und openCV2 on an 64 bit Workstation runnig Debian Wheezy. The Application I try to ...
2
votes
1answer
76 views

Can adding entropy to a copyrighted spatial data make it a new dataset?

I have a dataset of building polygons that is copyrighted. Say I applied some random noise to every point in each polygon, is there a theoretical measure at which the initial dataset is no longer ...
2
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0answers
197 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 ...
0
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1answer
122 views

Where to find POI data for places of worship (e.g. churches)?

I am looking for free U.S. state-wide and/or county-wide shapefiles that include geographic locations for places of worship. Examples include churches, temples, synagogues, and mosques. In other ...
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1answer
149 views

How to Plot Every Other Address on Street?

I have no idea if this is even possible. We run a Utility software company and need to know where to put the leak sensors. The sensors are put at either every other house or every two houses depending ...
2
votes
1answer
109 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
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3answers
225 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 ...
2
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1answer
204 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 ...
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1answer
111 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 ...
3
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2answers
90 views

All US 2010 Census Data - Tract Level

I'm trying to find where I can download all the data (summarized to the tract level). By all data, I mean population race Marital status job wage age sex same sex couples kids education I need ...
0
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1answer
363 views

How to source the boundaries(latitude/longitude) information for US states, cities, Zip level

I am trying to color code the states, cities, zips differently based on certain parameters. As the user zooms in they should be able to see the different colors dynamically painted on the maps. Was ...
1
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1answer
155 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 ...
1
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0answers
22 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 ...
1
vote
1answer
95 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 ...
5
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3answers
3k 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 ...
3
votes
1answer
321 views

How can I decrease size of geodatabase “Nominatim”?

I downloaded Nominatim http://wiki.openstreetmap.org/wiki/Nominatim/Installation. The database size is more than 400 GB. The speed of geocoding is very slow. I want to increase it. For example, I ...
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0answers
37 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
1answer
55 views

Sample classification datasets?

I was looking for some publicly available ground data classification datasets, specifically, locations in e.g. latitude/longitude with a description of the land cover/land use, and a reference e.g. ...
1
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2answers
182 views

Rasters added to mosaic dataset only display at large acale

I have a set of 357 rasters in .jp2 that I've added to a mosaic dataset. All but 7 of them display properly, but the 7 only display at larger scales, around 1:6500 and under. I've tried adding them ...
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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 ...
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0answers
36 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
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1answer
818 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 ...
2
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2answers
127 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 ...
1
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2answers
45 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 ...
2
votes
2answers
471 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 ...
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0answers
148 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
2answers
129 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 ...
3
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3answers
84 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 ...
2
votes
1answer
496 views

Shapefile of European Parliament constituencies?

Is there any shapefile (or similar vector data set) of European Parliament electoral constituencies? Some countries (e.g. Germany) are basically one constituency, but others (e.g. UK) are not. Is ...
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1answer
121 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 ...
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0answers
31 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 ...
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1answer
47 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 ...
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0answers
53 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
131 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 ...
3
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4answers
348 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 ...
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2answers
85 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? ...
1
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2answers
139 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
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2answers
49 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, ...
2
votes
1answer
75 views

Bathymetry dataset of Italy

I am looking for a dataset of bathymetry data of Italy. I shall use it in an application for collision avoidance of vessels coming into the port. I need to know how deep the sea bottom is at each ...
0
votes
1answer
91 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. ...
0
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0answers
34 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!
0
votes
1answer
312 views

How do I from convert from street level address to block/block group/census track?

I just downloaded block-level census data, using this answer Where to get 2010 Census Block data? It output a spreadsheet with a bunch of rows of the format GEO.id | GEO.id2 | ...
2
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4answers
124 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 ...
1
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0answers
192 views

Adding XY data from xls to Arcmap 10 [closed]

I am trying to add XY data to Arcmap 10. Coordinates are in DD but they end up in the wrong location at -1.48 0 all very close to each other (though they look like they are in the right shape just ...
1
vote
2answers
165 views

County-Level Ethnic Shapefile: United States

My professor usually provides the shapefiles that we deal with in our analyses of the United States--population, votes, etc., but I'd like to know how I can get these myself. I'd like, in particular, ...
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0answers
72 views

Where to get Annual Lightning Data (Zipcode) to use with ArcGIS for Desktop and AnyLogic?

I am building a Dynamic Agent Based Model for School and was looking for Annual Lighting Strike Data for zip codes in Ohio. I can get the state count from NOAA but want to get a bit smaller. I was ...
5
votes
1answer
139 views

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 ...
2
votes
1answer
219 views

Can I edit pixels values of an image with GDAL?

There is a method with GDAL (used in C/C++) to edit pixel values of a georeferenced image, maintaining the original file? Or I have to create a new dataset? My goal is to maintain ALL originals ...