Questions about obtaining data.

learn more… | top users | synonyms (2)

9
votes
5answers
1k views

Where can I get neighborhood boundaries?

Besides Zillow's creative-commons licensed neighborhood boundaries shapefiles, what sources of neighborhood boundaries are there? Not just in the US, but all over the world. Free/open source is ...
5
votes
3answers
387 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 ...
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 ...
3
votes
1answer
924 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
votes
2answers
982 views

What is the best practice for data management? [duplicate]

I have always been curious how other folks are storing their spatial data. Outside of an enterprise environment where much data is stored in enterprise geodatabases, is it better to store data per ...
12
votes
2answers
912 views

Where is Wikipedia's coordinate information stored, and how can I retrieve it?

Background: I'd like to add icons to my map showing locations which have Wikipedia entries. The WikiLocation API is a great resource for determining Wiki entries near an XY location, but it has ...
11
votes
3answers
1k views

What is a good taxonomy or naming convention for files and folders containing GIS data?

My company has collected about 30 TBs of GIS data over the past 8 years, and I always find myself asking the following questions: What type of data do we have for a given geographic area? What are ...
10
votes
12answers
1k views

canvec: why so quiet? where are all the users?

It has now been a little over 3 years since Natural Resources Canada released CanVec, a national coast to coast to coast spatial dataset at 1:50,000 or better nominal scale. In the interverning time ...
5
votes
2answers
218 views

Worldwide population density data not grouped by country?

Are there any data sources available, preferably freely (but not necessarily), which show population density without regard to country or constituency boundaries of any sort? I'd like to analyze a ...
3
votes
3answers
2k views

mysql database of bars, pubs and restaurants in the united states and maybe canada

I am mostly seeking Bars and Pubs but Restaurants are a very nice bonus. I need a database with zipcode, city, state, longitude, latitude, establishment name, establishment contact information, maybe ...
3
votes
3answers
313 views

Statewide (and more) Address Point data source

I am seeking a data source for a statewide address point layer. I do not need resident or business information at these addresses; I just need the validated structured addresses (preferably with ...
12
votes
6answers
828 views

What is the best way to visualize multiple large LIDAR tiles?

I want to load approximately 10 large LIDAR tiles for analysis. I have tried using ArcScene but it appears there is a limit on how much data ArcScene can handle at one time. Each tile is 65-90MB in ...
8
votes
3answers
761 views

How is raw OSM data processed for openstreetmap.org

Can anyone provide insight into how OSM data is processed or rendered for www.openstreetmap.org? A specific example... I extracted data from a recent planet.osm PostGIS dataset for an area in ...
7
votes
5answers
792 views

Where can I find annual temperature data for every city and town in the US and Australia?

Where can I find yearly annual averaged temperature data for every city and town in the US and Australia for a heatmap? links are good
5
votes
1answer
471 views

Russian GIS Data

Which companies are the best suppliers of vector, geocoding, imagery, and POI data in Russia? Which companies provide a complete service (which includes the above data types and also routing, ...
4
votes
3answers
2k views

Advice on using CityGML data and GIS

I'm looking for advice on how best to use the CityGML data-structure and GIS (preferably ArcGIS/QGIS). I've read through their website and wiki and saw a list of software here that can be used to view ...
3
votes
1answer
201 views

How does a newbie get household income data based on address to the block level?

I am beginning a research project and need to find a way to access the census data about household income. We need it at a closer level than by zip code since income varies a lot by zip code in our ...
3
votes
3answers
567 views

Do you know of any sites where I could find some cool recreational shapefiles?

Do you know of any sites that I could find some cool recreational shapefiles? An example would be shapefile of the golf courses, ski resorts, or maybe baseball fields in the united states?
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 ...
2
votes
1answer
728 views

Seeking shapefiles of business locations

Does anyone know where to find shapefiles of businesses such as grocery stores or gas stations? Thanks!!
11
votes
2answers
176 views

How could I rate roads for scenic drives?

relative GIS newbie here. I've been working on a personal project to rate roads on how nice a ride they'd be on a motorcycle. I wrote a Python program to work through road data in the TIGER dataset ...
8
votes
6answers
380 views

What GIS Data should Amazon add to its Public Data Sets?

Amazon says: If you have a public domain or non-proprietary data set that you think is useful and interesting to the AWS community, please submit a request below and the AWS team will ...
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 ...
6
votes
2answers
1k views

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
votes
3answers
1k views

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 ...
5
votes
4answers
1k views

Definitive source for downloading DEM data

USGS has been moving towards serving data through The National Map Viewer. They have several WMServices through their website that serve elevation data to the public (hillshade & DEM). The ...
4
votes
1answer
556 views

Joining Census Data

I have collected census data for a county in Pennsylvania. Data varies from 1999-2010. For my data before 2010, a significant number of blocks do not match up (image below) when I join the data ...
4
votes
2answers
1k views

Dividing Earth into continent polygons

Is there a simple (low res is fine) polygonal data set that divides the entirety of Earth's surface into continents, with no overlap and no area excluded? Specifically: North America, South America, ...
3
votes
3answers
307 views

Where to obtain free 15m ASTER image for New Mexico?

I am looking for a free Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image that will let me to perform NDVI for the pilot crop health/soil moisture that can go as far back ...
3
votes
0answers
155 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
2answers
278 views

Why can't I see all records in my personal GDB in QGIS?

I am running QGIS 1.8. I have a layer from an ESRI Personal GDB. There are 431 features in the layer. When you load the layer into QGIS, and look at the Metadata properties, it shows the number of ...
3
votes
3answers
336 views

Is there a projection issue with the NRC Canada Atlas hydrology data?

I have been using the Natural Resources Canada (NRC) data for various generalized maps but it is not until now when i overlaid higher resolution features obtained from the provincial government ...
3
votes
5answers
1k views

Ways to load OS VectorMap data

Us lucky fellows in the UK have been able to access public geodata from Ordance Survey under an open licence since April this year. Some of the datasets, including VectorMap, are broken into 100 ...
2
votes
1answer
233 views

I need some more information on ASTER for time series analysis

See my previous post on ASTER I have a question about that I am not sure about. So, if I wanted to analyze 10 years or so, do I need to download each ASTER file for each year (e.g. 2003 ASTER, 2004 ...
2
votes
2answers
3k views

Detailed Bathymetric/Bathymetry contour data (0-200M)

I am looking for free Bathymetric contour data in shapefile format for depths between 0-200 meters for North America. I prefer contours at 10 meter increments, but will take whatever I can get. I ...
2
votes
1answer
637 views

World map shapefile including disputed areas

I am looking for a global shapefile that allows you do show data for all disputed areas (like Waziristan, Spratlay Islands, Kahsmir, etc.). Do you have any idea where I can find a shapefile with not ...
2
votes
6answers
3k views

Where can I find shapefiles of pipeline data?

Does anyone know where I can get or find shapefiles for pipelines (USA location)? Preferably free as I've never done pipelines before and I'm meeting a client next week that is doing pipeline work. ...
8
votes
3answers
3k views

Where can I find free building height dataset for major cities around the world?

I am searching for building/property data which include building height, building area, lot size, and building type classifications(preferably as complete as possible). I am working on an Earthquake ...
5
votes
2answers
385 views

Does the USDA SSURGO database have a web-based API that I can query?

Based on a previous question, Can I download the entire NRCS SSURGO database?, it appears that it is difficult to import the entire USDA SSURGO database. The Web Soil Survey provides the ability to ...
5
votes
2answers
970 views

Shapefiles for U.S. Area Codes (NANP)

I have a bunch of telephone numbers (just the area codes), and I'd like to geolocate them and make a map, but I haven't had too much luck googling for shapefiles for Area Codes. Surely these are in ...
5
votes
3answers
222 views

Methods for lat/lon quality control?

I have a database with fields including latitude, longitude, city, state, and country. When mapped, it is clear that a number of the sites are in the wrong location - most commonly because of a sign ...
5
votes
2answers
2k views

Data organization strategies for .csv and .shp

I'm organizing a large amount of data for a project and the data is stored in .csv format, with a code to relate each row to a polygon in a .shp. I was planning on converting the .csv data into .dbf ...
4
votes
2answers
636 views

Indian Latitude Longitude values

I am in need of around 10000 and odd Indian latitude and longitude values for my openlayers project. I have to load them in a postgis db. so a sql file or atleast text file would be better than a ...
4
votes
1answer
651 views

UK cities boundries in Ordnance survey

Are there any city boundaries of UK cities in the Ordnance Survey?
3
votes
2answers
78 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 ...
3
votes
1answer
80 views

How to tell the size of grid cells created by the vector grid tool?

Im working with qgis 1.8.0 and Im making a vector grid on a map. Does someone know how big are the squares if the grid settings look like in the picture? Thanks for your time!
3
votes
1answer
176 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 ...
3
votes
1answer
2k views

GIS data for Singapore

Are there any free, publicly available datasets for Singapore? I've examined Openstreetmap, Global Admin Boundaries, GRUMP and the Natural Earth datasets, but I'm interested in vector data of higher ...
3
votes
5answers
1k views

When a raster is clipped to a polygon with Python, why does it still take on the extent of the entire shapefile?

I am clipping a raster image to each polygon row in a shapefile in ArcMap 9.3 using the Clip tool (Data Management) in Python with Clipping Geometry set. While the clipped raster successfully depicts ...
2
votes
1answer
509 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 ...