Questions tagged [population]

Use this tag for questions that are oriented specifically to problems in population science and to demographic analyses that have a spatial dimension.

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88 views

Splitting One Polygon By Boundary of Another using QGIS?

I'm using QGIS 3.0 and attempting to calculate the number of people that fall within a buffer. The population count is a field within my block group polygon layer. I've attached a screenshot, the ...
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1answer
62 views

Aggregating population data (at Census tract level) to voting district level in R

Suppose I had voting data from the 2016 election at voting district level, and population data (from 2010 Census, say) at the block or tract level. I am hoping there are no blocks/tracts in two ...
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1answer
43 views

Raster smoothing - assigning each raster the average value of its neighbors

I have a raster world map of population densities at a resolution of 30 arc seconds. For each raster, I want to find out the average density of neighbors within a certain distance (e.g. 0.1 degrees). ...
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1answer
53 views

Population centroid of irregular-shaped German counties based on a population density grid

I'm new to QGIS and stuck with this task. Here's the data I'm working with: 1-square-kilometer grid Shapefile of Germany (https://www.zensus2011.de/SharedDocs/Downloads/DE/Shapefile/Inspire.zip?...
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1answer
2k views

Seeking population of each Indian village and town?

There are over 600,000 villages in India. I want to get the population of each of the village according to 2011 census. I searched the http://censusindia.gov.in website for hours but could not get ...
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1answer
2k views

Finding and using data on population density files?

I'm attempting to replicate this map for the state of Nevada in QGIS: source: http://www.bostonfed.org/commdev/c&b/2014/spring/map-distance-to-closest-snap-outlet.htm (A SNAP outlet is just a ...
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236 views

Finding census block with highest pop. value within census tract using QGIS?

In QGIS, I'm trying to plot a centroid of only the census block with the highest population within each census tract. So there should only be one point per tract- that of the block with the greatest ...
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51 views

Population calculation per grid using QGIS?

I have a ward map of a city along with the population in each ward. I have divided the map into 1 km* 1 km grids. How do I calculate the population per grid, taking into account that there can be ...
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29 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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56 views

How to create an area cartogram in Shapefile format

I am working with state level data on health insurance to create a map with each state color-coded based on that data. This is fairly straight forward but some of the largest states geographically are ...
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1answer
40 views

Seeking population data for Detroit?

I need population and age breakdown data for Detroit. I have found census tract shapefiles but none with the attribute data that I need. Any idea where I might find such data?
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1answer
1k views

Multiplying Raster Value with Pixel size using QGIS?

i'm working on a map with population densities. My raster data contains values as [People/square meter] for each cell. I have per capita values of energy demand etc. which I want to multiply with the ...
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1answer
140 views

Distortion of City -Boundary-Polygons proportional to population size in QGIS?

Is there a way to distort the size of polygons proportional to their population size (as in column in the attribute table)? I want to create a map that looks similar to this: the cartogram2 plugin ...
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59 views

Clustering based on eqaul populations

I have a map of a city that is divided into 65 sectors (building lots in purple, sector boundaries in red): In my shapefile of building lots, I have an attribute that is the total population within ...
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1answer
157 views

Calculating Population Within Buffer in QGIS

I am new to QGIS and GIS systems in general. I have a shapefile of zip codes with associated populations inside them. I also have random lat/long points. I am trying to find the number of people ...
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1answer
34 views

QGIS 2.18 Make population point proportional

I am mapping population abundance and distribution of a bird species in a one area. I am using several years worth of data to show how population and distribution vary by year. The years are marked ...
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0answers
830 views

Trying to Create a Global Choropleth Population Density Map then add Biodiversity Level

I am trying, quite unsuccessfully, to create a global choropleth population density map for a specific 120 countries, using ggplot2. Once I have created this choropleth map, I want to add number of ...
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1answer
99 views

Identify most densely populated areas along streets with QGIS

On Google Satellite Imagery, I've created a layer with objects marking houses in a 1 km proximity to large streets in a rural setting using QGIS with the Openlayers Plugin. I would like to identify ...
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25 views

Smooth Data Values Across Geographies with Zero Population

Looking to fill in gaps through generalizing a population count across U.S. counties. I.e., if a county has 0 population, but is surrounded by 5 non-zero counties, then change the 0-population county ...
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290 views

Using Buffer areas to calculate population in ArcGIS Desktop?

I'm trying to figure out a process in ArcMap that will be able to analyze the approximate number of people living near transit stations. I'm eventually going to turn this into a Python script, but I'...
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1answer
3k views

Calculate population within radius

I have population data matched with polygons and a set of points that I have drawn buffers around. Assuming that the population within each geographical area, i.e. the polygons, is evenly distributed, ...
2
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1answer
53 views

How do I transfer data from one raster to another in qgis

I have 2 raster layers. The first is a mobile signal coverage raster with 0 and 1 values. The second is a population raster with value from 0.89 to 236. I want to transfer the population layer to the ...
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2answers
258 views

How can I calculate community populations with CIESIN / Facebook's new High Resolution Settlement Layer data?

Facebook's Connectivity Lab and the Center for International Earth Science Information Network (CIESIN) have released map data which offers unprecedented resolution in terms of population mapping. By ...
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2answers
566 views

Creating a population dot density map at the block group level in QGIS

I'm new to QGIS, always used ArcMap, and I'm struggling to find out how to best display population density at the block group level for a county (the most granular level of detail for census geography)...
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1answer
812 views

Determining future location of Fire Station using ArcGIS Desktop?

I have been tasked with creating a map and doing some analysis that shows the future growth (10 years) of our county. They would like to see where the future growth is likely to occur and also show ...
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31 views

calculating the population of destinations

I would like to calculate the population of my destinations I created with OD Cost Matrix. I have got population data but I don't know how to find the population of my destinations scattered on my ...
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0answers
62 views

Creating population weighted spatial join of two layers with intersecting polygons using ArcGIS Desktop?

I have data where I sampled my outcome using a grid of 1-mile radii but my explanatory variables are at the census dissemination area level. I would like to average my census dissemination area-...
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1answer
2k views

Calculate population coverage?

I am relatively new to QGIS. I am looking at the percentage of an population that has geographical access to healthcare. Therefore I have one shapefile with village boundaries including population ...
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1answer
661 views

GIS data in Sweden [closed]

Does anyone know where to obtain GIS data relating to Swedish postcodes - shapefiles, population and point location data? I'm interested in both open data and licenced (purchased) data if it is ...
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1answer
202 views

How do you aggregate attribute table data at LSOA level to MSOA level?

I have population data stored at the LSOA (Lower layer Super Output Area) but I want to aggregate the data into MSOA (Middle layer Super Output Area). I have the shapefiles for both LSOA and MSOA - ...
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1answer
68 views

How can I transfer the values of a grid of smaller polygons to another grid with larger polygons in ArcGIS?

I have a population density grid containing 100x100m polygons. I would like to transfer the density values into an existing overlaying grid of larger polygons (250x250m). This might of course include ...
2
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1answer
339 views

Getting rural/urban classification from Zip Codes

I have a dataset containing GPS coordinates and zip codes of locations from different regions in Spain, and I need to classify them as rural or urban based on either of these two information sets (and ...
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1answer
146 views

Analyzing population within buffer using raster population grid

I have a set of points and a population grid that is a raster file (http://sedac.ciesin.columbia.edu/data/set/gpw-v3-population-density-future-estimates/data-download). I am trying to solve how many ...
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1answer
3k views

Seeking India population by village, town and city for 1981, 1991, 2001 and 2011?

Trying to source population data for every village, town and city in India. I have been able to extract data for 2001 & 2011 from the census site, but am having a tough time finding a reliable ...
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1answer
98 views

Estimating population increase [closed]

How can I estimate the population in 2020 at a given area if you know that the current rate of increase is 1.25%/year? What tools do I need to in a GIS Software to make the calculation?
2
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1answer
275 views

Extract raster information based on polygon features

I have a population dataset in raster format (each pixel has a value showing number of people in that pixel) and a polygon shapefile with 10 districts. What I need, is to calculate population for each ...
7
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1answer
1k views

How to add attribute data up?

Sorry if this question is too simple/easy for you guys, but I'm still learning QGIS and pretty much teaching myself where I can. Is there a way to add data from 2 columns into one new column inside ...
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0answers
134 views

population density “hotspots” within ZCTA

With the available census tables (county, tract, block, zcta) and shapefiles, is it possible to identify "hotspots" of population concentration within a ZCTA? The ZCTA gazeteer file provides the ...
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0answers
98 views

gdalwarp crop_to_cutline generates error for some states

I am trying to crop states of a country by using gdalwarp . For some of the states I get this particular error, while for other states it runs fine. This is my second day at GIS/gdalwarp, so please ...
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1answer
596 views

Spanish municipality level shapefile and population data

I'm struggling with the Spanish municipality level. I need to incorporate population data with the lat/long for each Spanish municipality and below are the details of my current files: I cannot find ...
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2answers
8k views

Change Circle Size According to Value using R

How do I change circle size in a population map according to the population density of the location? library(maptools) library(RColorBrewer) library(classInt) library(maps) ## load the file ## pop &...
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1answer
509 views

find the population density of some points in qgis/postgis

I have the tiger census data of population density in each block group. I also have a different kind of data: traffic accident data, where an accident has a lat/lon pair. My goal is to find the ...
7
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2answers
986 views

How to redistribute population data using Python in ArcGIS?

I am trying to redistribute population data from census centroids among to housing density. Would you please help me to do that? I do have census area centroids (points) and the boundaries belong to ...
2
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1answer
1k views

How can I apply a color ramp to a shapefile layer in QGIS 2.8?

How can I apply a color ramp to a shapefile layer to show something simple like population variance? If this was ArcGIS, I would do it by using the Quantities tab in Symbology but I have been unable ...
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0answers
1k views

How to calculate a population weighted centroid using a raster and shapefile in QGIS?

I am very new to QGIS so please help me with a step by step answer. I have a raster file with population count and a shapefile based on a large population and shapefile. I have successfully created ...
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2answers
88 views

Population Change [closed]

I don't know if this site does general human geography, but since it's the only geography site I found this is the question. Population change takes into account 'growth rate' (which includes births ...
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1answer
205 views

Marker-width determined by population in animated bubble map. CARTO Builder

I'm trying to put together an animated map of population data for two different species on five different islands. I would like the population of each to be displayed as a standard marker whose width ...
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2answers
658 views

Where do I get data for density per city in the USA or Europe?

Basically I need the data this infographic uses, the density per city or better yet per km square. USA or EU is indifferent, need it for a project.
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51 views

Urban Center Boundary

I want to create an urban center boundary (in ArcGIS v10.3) by using a population-grid dataset. So, I selected high density cells, that is to say cells with population over 1.500 and hereupon I want ...
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1answer
132 views

Seeking land use/ land cover map, population density map for states of Gujarat and Maharashtra (in India)?

I need to find land use /land cover and population density layers for the states of Gujarat and Maharashtra in India.