The US Census provides a relationship file to connect ZIP Code Tabulation Areas (ZCTAs) with counties, county subdivisions, places, census tracts, congressional districts, and MSAs, found here: https://www.census.gov/geo/maps-data/data/zcta_rel_download.html
I'm looking for this same type of file, but linking ZCTAs to block tracts (preferred) or block groups.
Does anyone know if the Census or a third-party has published such a document?
Thanks in advance!
Mo
If you are using R, you can use totalcensus package to generate the file.
Related
I have a zip file containing several .CATPART, .CATDRAWING and one main .CATPRODUCT file. is it possible to upload all the files ( as a zip) and get the model translated ? and possibility of setting the main file. And is this tutorial still valid ?
Translating a ZIP file with multiple designs in it is possible. See this tutorial, specifically task #3 step #1.
Note however that the .CATDRAWING may not be processed during the conversion. See the list of supported translations.
I have a GIS Map in which I uploaded a shape file with the zipcodes of a given region. I want to generate random points inside these regions, but I haven't been able to get the region element with the zipcode String name. I tried using the searchRegionFirst and searchRegion functions with the region name loaded from the shape file but they end up finding other places not related to the zones I have. Is there a way to get the region by its custom name?
Thank you
I could solve it, I just leave the question in case someone runs into the same problem. So just go to the project panel and under the main->presentation->level->map you can find all the GISRegions created. Just select them all with shift and with the right click you can find the option to create a Collection of the GISRegions. Then just use this collection to iterate through the zones.
I queried some data from UNHCR for a refugee resettlement project on Syrian resettlement trends from 2010-2020 in four specific countries (Canada, France, Germany and USA) and have it saved as a .csv file. I am wondering if anyone knows if it is possible to create a feature class associated with the Country name or ISO-3166 alpha 2 code (for example, France or FR) to be a polygon coinciding with a country. I have been able to save this .csv as a point feature class and have looked on the ESRI help forums which give instructions however each time I import the file to ArcGIS Online it only displays as a point feature. If anyone has any insights or workarounds it would be greatly appreciated! I also have access to ArcGIS Pro if needed.
You will have to find a polygon feature class with the country boundaries to join the CSV data to (maybe see here https://gis.stackexchange.com/questions/23028/getting-polygons-of-all-countries-and-iso-3166-2-subdivisons). It sounds like the CSV just has one point (probably a centroid of the country) in it.
I also recommend you join https://gis.stackexchange.com as well to ask about the joins etc
I'm building a Florida county map using geoJSON. I downloaded 67 county files and combined them in Cartodb. The current file is huge: 4MB with thousands of lines of code, especially in the coordinates. Here's what it looks like. The map works, but it's slow to load on the browser. I've seen other JSON files that are smaller and easier on the browser. Is there a way to shorten the code so they still show the counties on my map? Maybe removing a majority of the coordinates?
you can use TopoJSON which is a topology encoding extension to GeoJSON.
"Rather than representing geometries discretely, geometries in TopoJSON files are stitched together from shared line segments called arcs."
read more: https://github.com/mbostock/topojson/wiki
repo:
https://github.com/mbostock/topojson
Not trivial. One problem is that you have multiple counties, using the same coordinates so they fit together (so the east of county A and the west of county B are identical).
You can analyse your data: If you have a line A->B->C, you can calculate how the area changes if you emit point B. Remove points as long as the total change in area is small. Make sure that if you remove a point in one county it must be removed in the other counties as well. Then you may check how much change you get by leaving out the last decimal of each point. Again, the same point must be changed in the same way in all counties.
There is a Free API to obtain US County in GeoJson format..u can add multiple counties(since u have a list)
https://www.mashape.com/vanitysoft/boundaries-io
Example query:.../rest/v1/public/boundary?and=true&county=Washington+County&state=MD
please note that some zipcodes do not fall within a county.
The U.S. government is releasing the Census redistricting data in this format on FTP and I don't know how to open it. I think they are supposed to be Tiger Line Shape Files, but they directory structure does not match what I would expect from the the Tiger Line Shape Files documentation.
They are .pl files, but I know they aren't really Perl files!
I'd like to get them into a Excel file, with headers on the top like "total population," "Caucasian population," etc.
The PL files are text files which contain the data you are looking for. You probably won't be able to open them in Excel
Alabama alone contains 319,739 records.
The easiest way to use these files is to load them into a Database and run queries to extract the data you need. Access templates are provided in the FTP you linked to.
There are no ESRI Shapefiles in the FTP you linked to, the shapefiles provide the geometric descriptions of census boundaries, Counties, Tracts, Congressional Districts, etc.