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)
379
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Unable to find needed California State Plane projection in QGIS
QGIS version: 3.12
OS: Mac 12.1
Problem: I am trying to project a map containing parcel boundaries (vector) and orthoimagery (raster) to match the projection used by a set of (offline) project plans (...
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14
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NHD's description of a river differs depending on which state it is in
So I downloaded the NHD shapefiles for both Texas and Arkansas rivers from here:
https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Hydrography/NHD/State/Shape/
I then pulled the route ...
- 334
2
votes
1
answer
69
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Creating new layer with custom regions from states boundaries in QGIS
I am trying to create a map where I can combine a layer of states boundaries and one other with custom regions (Est/West) on QGIS.
So I have tried it in different ways (union, intersection, merge ...
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9
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1
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157
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Why recommended transformation is not the most accurate in QGIS?
When I am prompted for a transformation to use in QGIS, the recommended/default option (in green) is the least accurate one. In my case, QGIS recommends a transformation with an accuracy of 6m when ...
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145
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Does the Census Bureau's geocoding API limit request frequency?
I am trying to batch-geocode about 8 million address records using the Census Bureau's batch geocoder. I am currently doing so sequentially, which takes about a day to complete. I was considering ...
1
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1
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90
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Making map with all 48 contiguous states resized so they each have equal land area using QGIS
How can I make a map in QGIS where I have all 48 contiguous states but they're resized so they each have equal land area?
It's important that I do this without distorting shape, so that they're still ...
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3
votes
1
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50
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Why would the NHD have wrong information / how to correct it?
According to the National Hydrography Dataset, the Blanco River in Texas consists of 108.3km of "artificial paths", 36.677km of it is a perennial river and 2.297km of it is an intermittent ...
- 334
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75
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California (Teale) Albers Coordinate System synonyms?
I am a newbie who has inherited some California point data with no obvious coordinate system just a lat column and lon column that are not actually latitude and longitude. If I display the xy data and ...
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2
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55
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Displaying location in ArcMap
I have a CSV file containing a location that I want to display as a point shapefile in ArcMap. The points are listed below. These points were collected 30 years back. I tried displaying using Add XY ...
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1
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73
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Creating correct buffers [duplicate]
I'd like to create buffers that have a radius of 100 km around the centroids of US counties. First I have the problem that my shapefile uses a layer CRS in decimal degrees. Furthermore, if I create a ...
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77
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How do parcels relate to United States Census hierarchy?
The United States Census Bureau operates on the Standard Hierarchy of Census Geographic Entities, which ranges from NATION (n=1) to Census Blocks (n=8.1 million as of 2022).
It is my understanding '...
- 109
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77
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Find latitude/longitude of northernmost, southernmost, westernmost, and easternmost points in county
I need to find the latitudes of the northernmost and southernmost points, and the longitude of the easternmost and westernmost points, in two US counties (one in Oregon and one in California). What is ...
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0
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165
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California PLSS Quarter and Quarter Quarter Section Layers
I am trying to find the quarter section and quarter-quarter section layers for the PLSS layers of the state of California. I have the township & range and also the section layers but was unable to ...
- 51
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1
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326
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Using California SRS Epoch 2017.5 (NAD83) in ArcGIS Desktop
I'm using RTK with SOPAC stations (http://sopac-csrc.ucsd.edu). The relevant reference system is California SRS Epoch 2017.5 (NAD83).
I am trying to load the coordinates I got in this system, but I ...
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1
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1
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138
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Converting coordinates in Harrisburg (Pennsylvania) to WGS84 using GeoPandas
I have points in Harrisburg, PA in a GeoPandas (Python) GeoDataFrame with no CRS.
How do I convert them to WGS84?
I'm trying to do something like below but don't know what CRS to initially set the ...
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113
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Creating fishnet across different UTM zones of USA
I am trying to create fishnet across the USA. In the end, I want to calculate summary statistics for the vegetation in each grid, as well as get the distance between the each cell's centroid and the ...
- 401
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1
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1k
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Seeking SRTM 90m data
I'm looking for 90 meter resolution SRTM data to coverage a large state in the Western US. I used to use Derek Watkins' awesome tile grabber for SRTM90: https://dwtkns.com/srtm/
but as he explains on ...
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1
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1
answer
90
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When did USPS stop shipping its TIGER/ZIP+4 product?
When did USPS stop producing its TIGER/ZIP+4 dataset?
Updates to the product page archived by the WayBack Machine stopped in July 2011, but it looks like some people might have been using it later ...
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2
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40
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How to find a piece of property on, say, Google Maps using Arizona's description?
How to find a piece of property on, say, Google Maps, using Arizona's description: S2 SE4 NW4 SE4 SEC 5 16N 19 SAC?
I found a different one described as: Section: 33 Township: 24N Range: 20W ...
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1
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1
answer
137
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Changing pixel size of georeferenced historical map
I have georeferenced an old toposheet from the US Army toposheet repository.
However, when I look at the georeferenced map, it looks very grainy (i.e. pixel size is too big). How do I make it easier ...
- 141
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0
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106
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Mapping election data by zip
I am trying to create a map of Presidential election results by ZIP code, but all I have been able to find is election data by county (too broad) and precinct (too narrow).
Does anyone know of a ...
- 109
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1
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579
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Get Census Tract given a Census Block OR Get Census Tract given Latitude/Longitude
I'm using Python and am looking to get the Census Tract of a location given either a latitude and longitude or a census block. I can get the census block given latitude/longitude from here: https://...
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14
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Seeking most natural unit of analysis in between US county and state
Do you have any suggestions for the most natural unit of analysis in between US county and state?
I am looking at Core Based Statistical Areas but those don't seem to cover all counties.
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3
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1
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136
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Working with the FlowDir in the national hydography dataset
In the National Hydrography Dataset there's a FlowDir field.
According to https://www.townofnewipswich.org/sites/g/files/vyhlif4766/f/uploads/dataset_dictionary.pdf the two possible values for FlowDir ...
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3
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2k
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List of extreme latitudes and longitudes for each US state?
I need a list of extreme latitudes and longitudes for each US state. That is, max / min latitude, max / min longitude.
The purpose is to exactly center each state map when initially shown.
I found ...
1
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1
answer
138
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Filtering demographic data for USA using TIGER/CENSUS data
I am working on Texas demographic data for a client. The ask is to collect demographic data for ZCTA areas of Texas state. I am looking for help in the source and linking demographic data for these ...
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1
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1
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186
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What coordinate notation is this?
I have a shapefile with, for example, X_coords and Y_coords of 870058.5631 and 3226158.25 respectively. I want to convert these into decimal degrees in ArcGIS pro, but none of the input coordinate ...
- 93
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1
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114
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Points in shifted with different projected coordinate systems in same map
I am trying to map points on top of a map of Michigan taken from eBird a citizen science platform that records where birds were sighted. I downloaded an excel file for ebird sighting points, to use in ...
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-3
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1
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198
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Is there an Excel, Stata, MATLAB, R or Python program or online website that converts geo-coordinates to distance at large scale? [closed]
I have the geo-coordinates (latitude and longitude) for more than 1000 counties (in Excel) in the US, and I want to know their distances to a particular county with known geo-coordinate.
Is there an ...
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1
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1
answer
1k
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Appropriate CRS for Close Distances in USA
I have a very big dataset in the form of longitude-latitude points in the US; with points from the entirety of contiguous US. I need to calculate the distances between points and check if they are ...
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2
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3
answers
217
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Range of numbers for Township and Range
I am creating a GUI for input of PLSS data (Township, Range, Section).
There will be 5 pull down or spinner components:
Township, North/South, Range, East/West, Section
The North/South component will ...
- 393
1
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0
answers
529
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Seeking shapefile of urban, suburban, and rural areas of US [closed]
I'm looking for something like this, doesn't have to be super accurate. I've tried searching for the source of that image but to no avail.
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1
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39
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Where can I purchase small scale high res raster imagery?
I am doing a personal project in my neighborhood that requires some georeferencing and as such I am looking for some sub-1m accuracy orthos with which to assist. The normal free sources such as USGS ...
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1
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231
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How to show Puerto Rico in "albersUsa" projection in Vega-Lite or Vega?
I have a shapefile that has all the US counties along with Puerto Rico and I want to visualize them in "albersUsa" projection using Vega or Vega-Lite.
Problem is that in other projections, ...
- 173
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0
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How to read *_LOW_HN / *_HIGH_HN fields in NY Street Centerline Data?
I've been looking at the NYC Street Centerline (CSCL), in particular number ranges for individual street segments.
Quite a few look like this:
ST_NAME L_LOW_HN L_HIGH_HN R_LOW_HN ...
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0
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0
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32
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Identifying State Parks in the PAD-US dataset (Protected Areas Database)
I'm looking to map "State Parks," and I found this phenomenal, but complex database. Has anyone ever worked with the PAD datasets before? (or know any easier way to map State Parks?)
In the PAD ...
- 1,080
1
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2
answers
456
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Seeking PLSS Quarter of Quarter Sections in Oregon
I'm looking for a quarter of a quarter of a section (PLSS) which is 40 acres in size for the state of Oregon. I looked at several government and Oregon state web site and could not find it. The only ...
- 416
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1
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195
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Which map projection is suitable for distance measurement purpose in USA?
I'm developing an application which uses PostGIS functions for measurements in the USA. In nutshell: the software is running in a car and use PostGIS functions in real time. For example: to measure ...
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2
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1
answer
2k
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Converting xy point to lat/long
I have data with columns x,y, address.
And no any information about the projection of x,y points.
How can I convert these points to correct lat/long pairs?
1091969,199515,27 HEDGEWAY CT
1092046,...
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1
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1
answer
48
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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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0
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27
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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 ...
- 111
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1
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98
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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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4
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1
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2k
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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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12
votes
1
answer
2k
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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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4
votes
1
answer
825
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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 ...
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1
answer
4k
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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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1
answer
36
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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 ...
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0
answers
25
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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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2
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2
answers
89
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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 ...
3
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1
answer
285
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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 that border the Great Lakes have boundaries that protrude into the lakes in strange ways.
...
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