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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1answer
19 views

ACS Data Interpretation

I am working with ACS 5-Year Data at the block group level in ArcGIS, and was hoping someone could explain what one of the elements on my attribute table means. I know that the B00001e1 is some type ...
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0answers
23 views

Finding distances associated with change in latitude and longitude at given location [duplicate]

I am writing a program that uses GPS lat and long coordinates and a time change to determine speed with the output in units of m/s (precise to 0.1 m if feasible, but 1 m is sufficient). When ...
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1answer
24 views

US Census Bureau Shapefiles with district IDs

I am loading senate district polygon shapefiles from https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2019&layergroup=State+Legislative+Districts into my Leaflet map. Well, to be ...
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2answers
10k views

What is Google source for United States topographic data? [closed]

I'm looking for as detailed as possible topographic data for a certain area and have found information displayed by Google Maps to be far more detailed than what is provided by 7.5 minute maps (from ...
1
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1answer
44 views

Choosing CRS for Chicago, Illinois

I have data for Chicago, Illinois, that is in WGS84 CRS. I need to convert it to a metric projected CRS, and I've found several possible options: EPSG 3528 EPSG 6454 EPSG 2790 EPSG 26971 Among these,...
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2answers
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.
2
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5answers
2k views

Seeking high-resolution (at least 1 foot) imagery of California

Is there a national site or state site that will allow me to download High Res (1') aerial imagery of California? I have tried Cal-Atlas Download but they are at one meter. I have also tried USGS ...
3
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3answers
1k views

Proj4 String for NAD83(2011) / Louisiana South (ftUS)

I am trying to convert NAD83(2011) / Louisiana South (ftUS) coordinates on survey maps to lat/lon using Proj4 in Python. Could someone point me in the right direction? I have verified the lat/...
7
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1answer
798 views

Why is there no state with code “03” (among other missing numbers)?

The US census documentation for state codes is missing several numbers. For example, there is no state with code "03", "07" and others. Here is the start of the list... STATE|STUSAB|STATE_NAME|...
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3answers
541 views

Find Mapping of Place Codes to County Codes

I have two datasets with columns described below: A list of all "place" names derived from here (US Census): And this one, a list of county FIPS codes, also derived from the US Census (here) I ...
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1answer
14 views

2010 Block Group Income

Does anyone know why there isn't 2010 income data at the block group level on American Fact Finder? I don't see it at the census tract either. Looking for documentation explaining why it's not there ...
0
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1answer
117 views

Looking for an Elko County Nevada Land Ownership Shapefile

I am looking for a Nevada Land Ownership shapefile. County and state GIS don't seem to have anything beyond pdf. Are there any public or commercial avenues to acquire land ownership in Nevada? I'...
1
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1answer
59 views

Why does Google Maps display strange, jagged state boundaries in the Great Lakes?

When I search for a state on Google Maps, I am shown the state outlined in red. I've noticed that the states the border the Great Lakes have boundaries that protrude into the lakes in strange ways. ...
0
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1answer
172 views

Looking for a complete list of cities by state, with area code

Our company is working on moving our sales assignments from area codes to ZIP codes, and we need some kind of dataset to help move existing assignments to the new system. Does anyone here know where ...
4
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5answers
10k views

Finding GPS coordinates of geographic center of US counties? [closed]

How can I find a list of the GPS coordinates of the geographic center of each US county?
4
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1answer
70 views

Is the ESRI ArcGIS definition of California Albers projection using units of feet correct?

There is a map projection promulgated by the government of the state of California and recommended for use in certain state and municipal regulations. It is an Albers Equal Area projection with ...
1
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1answer
807 views

COUNTY WebService API lookup from valid street address

I am looking for a solid WebService API that will allow me to submit an http request with a pre-validated US Street/City?state/Zip Address and return COUNTY in xml or json about 200 times per work day....
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1answer
79 views

How many zip codes are in more than one state? [duplicate]

According to the accepted answer of Determining which US zipcodes map to more than one state or more than one city?, there are only 13 zip codes in two states. Reading down further on the page, ...
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2answers
128 views

United States City/State comprehensive database [duplicate]

I have been searching online for a comprehensive record of all Cities by State in the United States. When I searched I found some dead links to old data sets. Where is the best place to find such a ...
1
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0answers
13 views

Accessing past USDA NRCS data

I am constructing a panel that includes past crop yields, but I found that SDA/WSS/GDG only grant access to the current version(2019) of cross-sectional tabular data. Is it possible to access ...
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1answer
62 views

Seeking framework for navigation and routing for US

I'm building an app that will have navigation and routing as a primary component (USA Based). Does anyone have an cross-framework experience or user knowledge on which of the top mapping engines/...
2
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2answers
42 views

Seeking NRCS soil survey data at state or county scale?

Ideally, I would like to download all the NRCS's soil survey data for Pennsylvania, as is shown on Web Soil Survey. However, if it's not possible, I would like to at least get the data for Bradford ...
2
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3answers
406 views

What USGS maps exist in the 7.5' × 15' metric 1:25,000 series?

While browsing through the library, I discovered that USGS has, in fact, produced some metric maps at 1:25,000. One example is Thendara (NY), 43075-F1-TM-025. As far as I can tell, those maps are ...
0
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0answers
44 views

Java example of batch geocoding with the US census bureau's geocoding API

I am geocoding a batch of addresses with the US Census Bureau's free geocoding tool. I am following the guide at https://geocoding.geo.census.gov/geocoder/Geocoding_Services_API.pdf. I have a ...
2
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2answers
30 views

What are TRW or TRE formatted locations?

I have data from a U.S. state and for each item, there is a Location ID in the format T##R##E-## Sometimes the E is a W. What is this format?
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0answers
57 views

Downloading Census data to PostgreSQL PostGIS TIGER extension for Amazon RDS database

Can someone point me toward instructions on how to download census data for the postGIS_tigerP_geocoder extension? I would like to use the geocode() function, but any query returns 0 results. From ...
0
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1answer
80 views

Seeking free high resolution imagery for Las Cruces, New Mexico area

I am looking for a free download Imagery that is a very high resolution and the most recently like the past 3 months. I'm doing to produce a map where our new building being move into next year. ...
2
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0answers
315 views

Geocoding Guam addresses with their latitude/longuitude? [closed]

I am attempting to get lat/longs for a table of 25,000 addresses for Guam. Guam's addressing style doesn't follow the typical address number range. I've exhausted all of my geocoding resources. ESRI, ...
0
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1answer
206 views

Seeking crosswalk of census tract to town instead of CDP?

I'm trying to match towns from a dataset to Census tracts in the year 2000, with FIPS code as a place identifier. I'm aware of http://mcdc2.missouri.edu/websas/geocorr2k.html#GFOPTS, the GeoCorr ...
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1answer
36 views

Seeking US coastal shapefile

I need to calculate distance to the coast based on a latitude and longitude point. My concept is to use a line of the East Coast to calculate the distance. Does anyone know where I can find a ...
0
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2answers
117 views

Seeking Demographic Information of U.S. Census Blocks

I am struggling to find the blockwise (not blockgroup or tract) data like employment status, household income, commuting distance, list of place of interest, industry information. By using American ...
4
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1answer
2k views

Getting household income data based on address to 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 ...
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0answers
15 views

Finding satellite imaging showing developments in landcover in specific geographic areas?

I'm a student looking to compare the development in landcover every 5(ish) years across San Diego county & am not finding much luck with it so far.
1
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1answer
45 views

Projecting as USA_Contiguous_Albers_Equal_Area_Conic_USGS in QGIS?

Is it possible to project EPSG: 6350 (NAD83 (2011)) as WKID: 102039 (USA_Contiguous_Albers_Equal_Area_Conic_USGS) in QGIS? There is no EPSG code and I'm unsure how to create a custom CRS.
0
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1answer
58 views

Replicating standard D3.js Conical US Albers projection in QGIS?

Oftentimes, when I see maps of the US rendered online, they use a custom version of the Albers projection, like so: Alaska and Hawaii are off to the side, nicely arranged. I'd like to replicate this ...
2
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1answer
827 views

Using US Census block group data field names for feature classes?

I may be missing something here, but it seems like getting usable US Census data into a shapefile or feature class is much harder than it used to be. Downloading the Tiger block group shapefiles is no ...
0
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0answers
26 views

Seeking high resolution real-color (RGB imagery) dataset?

Specifically interested in the the South Florida region, USA. The aim is to pull up high quality aerials to detect manholes and wellheads from space! These things can typically be half a foot to a ...
0
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1answer
19 views

Translating one raster's contents closer to another’s with each at different scales using QGIS?

I'm working with multiple raster images, each in the Albers Equal Area Conic projection: one of the mainland US, one of Alaska, and one of Hawaii. I'd like to translate the Hawaii layer to be closer ...
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1answer
2k views

Seeking GIS data about NYC's combined sewers (CSO) that's free to use? [closed]

I've located two sites that display the data that I'm looking for, but both lack exporting functions. OASIS NYC and maps.nyc/gov Otherwise I can't locate this data anywhere in a format I can use in ...
0
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2answers
90 views

Seeking historic aerials for some areas in Dona Ana County, New Mexico?

How do I find several historic aerials from the mid-1970's or early 1980's and where can I download them? I would like them to be free of charge.
5
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1answer
116 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 ...
9
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1answer
624 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.
1
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1answer
181 views

What projection should be used along Gulf Coast?

What projection should I use along the Gulf coast - spanning the west coast of Texas to the Florida panhandle. I need to perform spatial analysis for a data-set along the coast. I see a similar ...
0
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1answer
119 views

Adjusting Alaska and Hawai in d3

I am quite new to d3 and I am trying to make a choropleth map of the US. But my point is how to adjust Alaska and Hawaii in the final map. In the past I used to do this in Illustrator, but I am not ...
2
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1answer
1k views

Mapping Longitude and Latitude to US state

Is there any database (Gov data or private) or web service that map Longitude and Latitude to US state? I have the specific Longitude and Latitude of a location and would want to identify the state ...
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1answer
35 views

Seeking Boston shapefile 1630?

I found this map on Reddit and was curious if anyone knows how it was made. https://www.reddit.com/r/boston/comments/2xu9ix/modern_map_of_boston_compared_to_original_1630/ I think I could make it ...
13
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7answers
21k 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 ...
2
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1answer
53 views

Seeking USA congressional district to county relationship files?

This must be a common enough problem that other users have come across it. I've finagled my way around inconsistencies and dropped observations, but now I'm reaching out to see if anyone knows of a '...
0
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0answers
31 views

Obtaining geographic data for California?

Where can I download census tracts and infrastructure data of California for 1997?
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1answer
51 views

Seeking API/software tool that will return US state senate and state house district number for given latitude/longitude?

I have a bunch of addresses that I need to find the corresponding State Senate and State House district for their latitude and longitude. It is possible to use shapefiles in QGIS to get this ...