Questions tagged [redistricting]

Redistricting is the process of drawing electoral district boundaries in the USA.

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15 views

Creating additional attributes for regional intersections?

A certain country is (simultaneously and independently) divided into 400 regions and 100 judicial districts. Each division is represented by a separate multipolygon layers with units as features. ...
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26 views

Dividing polygons into equal sub-regions based on population using QGIS? [duplicate]

I'm using demographic data in California by census tract, and I'd like to be able to group those census tracts into 4 regions with an equal population in each region. Any recommendations for how to do ...
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Dividing space into homogeneous connected areas [duplicate]

Is there an algorithm (or software) for splitting a map into K connected areas such that the within-area variance of some variable is minimised, and the between-area variance of that variable is ...
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1answer
42 views

Modifying polygon attribute interactively on web map for public interaction

I am looking for examples or ideas on how to create a web map using esri javascript api for redistricting purposes. On the web map, it would show the school boundaries in smaller sections (similar to ...
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1answer
103 views

Calculating change between two sets of district lines?

I'm using the Census Shape files for state legislative district lines for 2008 and 2012. I want to create a measure that indicates how much these lines have changed between these two time periods (...
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45 views

Dissolving closest area or area with biggest shared boarder [closed]

I am almost finished with a very large districting project but I'm having problems with this last step. I am using ArcMap I have made districts that needs to be larger than 150 residents. My last ...
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167 views

Redistricting for QGIS plugin,voters field error

I'm using the Redistricting for QGIS plugin .My QGIS version is 2.14.10-Essen.I'm getting this error message:The pengundi (voters field) must be an integer number field. My shapefile is the shp file ...
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1answer
61 views

Determining which polygons only intersect once with the polygons of another shapefile

I have two shapefiles, one for counties and one for congressional districts. I need to determine which counties are in more than one congressional district. I would think I could use postgis and use ...
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207 views

Creating “districts” from points [closed]

Hypothetical situation: I've got a database with 100,000 customer addresses, which are spread out across the continental US. I've also got a year end totals for number of purchases and value of ...
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1answer
678 views

Simple Spatial Join of Point Feature to Polygon Target Feature Not So Simple (Source Files Included)

I have what should be a simple task to perform: join ~47K census blocks from the PL redistricting files with pop and racial data joined to Chicago Public Schools High School boundaries to get an ...
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2answers
700 views

Which census geography boundaries do congressional districts preserve?

Tried searching for this information elsewhere and couldn't find a clear answer in the TIGER documentation, so I thought I'd turn to you good folks. Obviously, congressional districts can cut across ...
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2answers
1k views

Steps for redistricting using ArcGIS Desktop or Open Source GIS? [closed]

I have been struggling with how to redistrict in ArcGIS Desktop so can anyone put me through the necessary steps, data, extensions, to perform this operation. More so, is there any Open Source GIS ...
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3answers
2k views

Where can I find the finest granularity of 2010 US census population information?

I am writing a re-districting application where I want to be able to create US voting districts based on geographic coordinate population data. In a perfect world, I would have the population for each ...
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2answers
772 views

Aggregating Polygons To Meet Privacy Requirements

I have a point feature class representing office locations of all employers in a certain industry. The feature class has an attribute for storing the number of employees working at each office. ...
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1answer
214 views

What spatial analysis did the US Supreme Court review in the Perry v. Perez opinion?

The Supreme Court recently issued an opinion on Perry v. Perez which seems like it must have involved evidence based on spatial analysis. The L.A. Times reports: The 9-0 decision set aside a new ...
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1answer
3k views

Seeking tools for regionalization/redistricting?

I am looking for tools for regionalization / districting in GIS. So far I have been able to identify Districting ArcGIS extension (now also online) REDCAP (currently limited to 50k input polygons) ...