Questions tagged [united-states]

Use this tag for Questions which are specific to the country of the United States of America (USA), Do not use for United States Virgin Islands (VIR)

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53
votes
10answers
53k views

Sources for US Zip Code Boundaries?

I was just wondering what the most up-to-date source for US Zip Code boundaries would be. My first thought was TIGER, whenever that comes out, but then I thought that the Postal Service might be a ...
46
votes
12answers
4k views

Geocoding USA addresses that cannot be sent over internet?

For a one-time project, I need to geocode a few thousand addresses. In the past I've used various online resources for this kind of thing (e.g., Google Maps API), but the addresses I'm working with ...
44
votes
11answers
94k views

Obtaining up-to-date list of US ZIP Codes with Latitude and Longitude Geocodes? [closed]

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 ...
39
votes
10answers
46k views

Where to get 2010 Census Block data?

I would like to download 2010 Census Block Data for several towns and I can't seem to find it on American Factfinder. Is it there? And if not, does anyone know where I could find it?
21
votes
9answers
10k views

Seeking GIS data for fast food industry?

I am working a small project related to fast food industry. I am trying find GIS data for fast food chains like subway, MC Donald's, Arby's, etc in state of Ohio. Basically, I am looking for point ...
21
votes
8answers
76k views

Determining which US zipcodes map to more than one state or more than one city?

I'm using a zip code listing, and I am curious to know how many (or which) zip codes map to more than one US state or US city? For instance I know that Zip Code 42223 resolves to US Army, Fort ...
20
votes
5answers
20k views

Finding footprint data for US buildings?

Are there any sources for free and distributable building footprint datasets for major cities around the United States? Ideally, the data would also have the number of stories of each building; is ...
17
votes
8answers
40k views

Seeking shapefile of city boundaries in 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.
16
votes
2answers
3k views

Why are Galileo satellites inaccessible in USA?

I see that some (or all?) Android devices that support Galileo global positioning system are deliberately programmed to self-disable their Galileo support when used in USA or US territories. This ...
13
votes
3answers
628 views

Does transforming to a new projection, then back, affect data accuracy?

I have a feature class (South Carolina counties, so a fairly large geographic area) in NAD83 SC State Plane. It needs to be transformed to a second projection (NAD83 UTM 17), then transformed back to ...
13
votes
4answers
10k views

Downloading DEM data for US?

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 ...
12
votes
3answers
28k views

Which projection is best for mapping the contiguous United States?

If I wanted to project latitude & longitude data for the contiguous United States (the United States excluding Alaska and Hawaii), which projection would I use? I prefer more accurate distances ...
12
votes
7answers
20k views

Source for GeoJSON data for the US

Does anyone know of any good sources for US data (counties, congressional districts, etc) in GeoJSON format? Has anyone converted public-domain shapefiles/sources to GeoJSON that they would be willing ...
12
votes
1answer
21k views

Choosing projected coordinate system for mapping all US states?

I'm on a project requires integrating data for all states in the US. It means I have two roadway datasets and I'm going to assign the attributes of roadways in one dataset to the same roadways in the ...
10
votes
2answers
3k views

What is the source of horizontal and vertical striping in USGS DEMs?

When processing 30m and 10m DEM data downloaded through the National Map Viewer from the National Elevation Dataset, we noticed horizontal and vertical striping not only in the produced results, but ...
9
votes
1answer
623 views

OpenStreetMaps offline tile packs

Is there a place where I could download OpenStreetMaps tile packs for the united states? I would like to have offline access for the whole country.
8
votes
5answers
5k views

Meaning of dash in house address number in USA?

I have a set of addresses with a dash between the numbers: 800 - 1100 HORD ST 75202 2400 - 2500 KITTRELL ST 75201 I thought this refers to houses from 800 to 1100 and from 2400 to 2500 on those ...
8
votes
1answer
3k views

Are there duplicate Zip codes in the US?

I am testing a solution for a tax calculation system, and some states have zip code ranges with specific taxes, so I need to know if there are zip codes that correspond to different locations. One ...
8
votes
2answers
158 views

Identify this state outline file

Some time back, I came across a site that was offering sets of US state outlines that were intended to be attractive/artistic rather than geographically accurate. I only have this copy of the outline ...
7
votes
4answers
148 views

Identifying geographies that match certain climatic profiles through GIS

The long and short of this research is trying to find roads that lie within geographic areas that fit a given climatic profile. In this case, I need to find areas within the United States with ...
6
votes
1answer
1k views

Displaying data from two UTM zones on one map?

With at least some USGS quad maps, maps that overlap into adjacent UTM zones continue to use the same false easting (rather than start at zero in the middle of the map). Is this a required standard ...
6
votes
4answers
2k views

Using American Fact Finder to download data for all block groups in state at same time?

I am having issues using the advanced search on the American Fact Finder to download census block data for a whole state at a time. The best option that it gives me, when trying any route, is to ...
5
votes
4answers
3k 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 ...
5
votes
5answers
2k views

How do I locate cities or town polygon shapefiles?

Does anyone know of a reliable source where to download city/town polygon shapefiles? I'm specifically looking for NY and NJ. I have come across point shapefiles, but not polygon. For example in NY ...
5
votes
3answers
3k views

Seeking location of all Universities and Colleges in North America?

This seems fairly straightforward but I'm having trouble finding the right data. All I need is the name, address, and lat long of all universities and colleges in North America. I've come across a ...
5
votes
1answer
6k views

Does anyone know what a geoid10 and its numbers mean?

I am doing home for my GIS class where we had to download census data from our county and to define what geoid10 and its numbers mean. I cannot find the definition anywhere.
5
votes
1answer
4k views

Getting a list of zip codes with its adjacent zip codes

I need a list in the form of adjacency list that contains all zip codes in the United States that each has a list of adjacent zip codes. I tried searching for it on the internet. Many of them only ...
5
votes
2answers
940 views

Soil maps - displaying specific soil types QGIS

I'm trying to isolate a couple specific soil types from the GIS soils layers for a county in my state in the US. I downloaded the data: ftp://ftp.igsb.uiowa.edu/gis_library/Counties/Adair/soil_01/...
5
votes
2answers
6k views

Seeking USA electric transmission powerlines as shapefiles?

Does anyone have a good source for USA electric transmission powerlines as shapefiles? I have some old (1993) data from the US National Renewable Energy Laboratory (NREL) and Cubewerx' WMS (Cubewerx ...
5
votes
1answer
112 views

What level of error expected when using NAD StatePlane CRS from adjacent state?

I am adding Georgia data to my GIS database and, unlike the California data I've added, have decided to use my existing EPSG:3361 (South Carolina StatePlane) coordinate reference system for ...
4
votes
9answers
18k views

Finding 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. ...
4
votes
2answers
123 views

Getting 8 digit watersheds for USA

Is there an alternative source for 8-digit (vector shapefiles) US watersheds? The USDA link is down and they are not responsive to my query for getting the data: https://gdg.sc.egov.usda.gov/
4
votes
4answers
5k views

California State Parcel Data

I am looking for California state parcel data such as owner name, no. of stories, year built etc., for each parcel. I can get to the level that I can browse them in property appraiser site but don't ...
4
votes
3answers
232 views

CRS for submission to Minnesota DOT

Does anyone have experience using QGIS to submit shapefiles to the Minnesota DOT (MNDOT)? I am using EPSG:26915 but got rejected due to an error in the CRS. MNDOT Specs call for "UTM coordinates,...
4
votes
4answers
7k views

Does the NED use geocentric or geodetic latitude?

What kind of latitude does the National Elevation Dataset (NED) use? Geocentric or geodetic or something else? I can't find the information anywhere on their site (http://ned.usgs.gov/index.html) or ...
4
votes
2answers
321 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 this ...
4
votes
3answers
380 views

USA County level, detailed OpenStreetMap basemap in tiff?

Is there any way to get detailed (close zoom) OSM tiffs at the county level in the USA? I would like to use them as basemaps for a class I am teaching in GIS, using QGIS. I know about (and love) the ...
4
votes
5answers
3k views

Data providers equivalent to USDA/NRCS/FSA Common Land Unit (CLU)?

For one of my agricultural projects, I really need reasonably accurate field boundaries for fields in the US, specifically Iowa right now but later, other similar states. The USDA/NRSC/FSA Common ...
4
votes
1answer
681 views

Annual Precipitation Data Sets

I am looking for annual precipitation maps for Minnesota and South Dakota. Preferably in a raster or polygon format. Basically, something I can spatially tie to data in a large database. I have been ...
4
votes
1answer
1k views

Choosing Projection for Gulf coast region of USA?

What are the most appropriate datum and projection I could use for the Gulf coast region - spanning Louisiana, Mississippi, Alabama, and Florida? I have to analyze block group data along the coast.
4
votes
1answer
754 views

USA Contiguous Albers Equal Area Conic to miles

My data is in USA Contiguous Albers Equal Area Conic projection. How can I convert the USA Contiguous Albers Equal Area Conic projection to miles?
4
votes
1answer
2k views

Choosing map projections specifically for San Francisco Bay Area?

I am asking because I am not familiar with specific map projections for the San Francisco Bay Area.
4
votes
1answer
395 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 ...
4
votes
1answer
503 views

How to automate FGDC metadata generation in ArcGIS?

Does anyone know of a tool or script to automate FGDC standard metadata for ArcGIS? I would like to be able to select multiple feature classes and fill company info., dates, etc.
4
votes
2answers
503 views

Extract tract shapefile from 2006 US Census

I have downloaded the 2006 census tract files. This version does not have the shapefiles format but the tiger format. I am able to load the data in python using following code: import ogr ...
4
votes
1answer
2k 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 ...
4
votes
2answers
726 views

Seeking Alabama GIS Clearinghouses?

Alabama's data portal (portal.gsa.state.al.us) is down and I haven't come across any other GIS clearinghouses for AL that are as good as say, Florida's FGDL. Does anyone know of a decent GIS ...
4
votes
1answer
2k views

USGS Topographic Map Online API?

I am creating a website for a non-profit organization and would like to plot points on a map similar to this: http://www.arcgis.com/home/item.html?id=931d892ac7a843d7ba29d085e0433465 I am currently ...
4
votes
2answers
151 views

Determining accessibility of U.S. street address

I'd like to determine whether a given U.S. street address is publicly accessible to vehicle/foot traffic. This would include addresses on both publicly and privately maintained roads that are not ...
4
votes
1answer
303 views

Seeking Septic Tank Location Data for Southeastern United States?

I am compiling a database of septic tank locations to make some rough estimates of the magnitude of return flow to the groundwater system for the Floridan aquifer system. Ideally I would have a lat/...