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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1answer
29 views

What scale to specify when getting a summary statistic for an entire country?

I am trying to calculate the population in a country as follows: //Population per square km: var pop_count = ee.ImageCollection("CIESIN/GPWv411/GPW_Population_Count").filter(ee.Filter.date('...
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1answer
81 views

Splitting population between overlapping polygon features

I have a quadratic grid with a different population in each square as the first layer and I have polygons that I made with the ORS Plugin as the second layer. In my previous question, I got some good ...
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2answers
58 views

Counting population within polygons

I am really new with QGIS I have a quadratic grid with different populations in each square and I have made polygons with the ORS plugin. The polygons cover some squares in full and some squares only ...
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1answer
61 views

Calculating average elevation from given points layer and DEM

I am using QGIS 3.18. I have a point layer showing population estimates at the administrative center points and an aster digital elevation map. I'm trying to calculate the average elevation of these ...
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1answer
31 views

Categorising raster data based on shapefile boundaries

I've tried searching for an answer but honestly I'm not even sure how to word my search. I'm using Arc GIS Pro. I have two layers that I want to analyse. The first layer is a shapefile and it covers ...
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2answers
241 views

Note QGIS raster calculator defaults to not being accurate

[Edited title of post based on fact that @wingnut solved it] I'm trying to normalise a population density map such as this one (e.g. to a maximum of 255). The maximum value in the file to begin with ...
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1answer
41 views

Dividing value of polygon in polygon inside it [duplicate]

I'm working with population data. I want to divide the population value (labeled in the orange square)in the polygons inside it (blue polygons). Any ideas?
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1answer
25 views

How to control for population density?

My project requires me to control number of stores by population density in each neighborhood. For instance, suppose I know neighborhood A has 10 stores and a population density of 100 people/sq mile ...
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1answer
42 views

Seeking data on population per postcode district in UK [closed]

I'm searching for a data set which contains the population of each postcode district (e.g SG1 or LE2) in the UK. I'm struggling to find this anywhere especially for free. Is there anywhere I can find ...
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0answers
77 views

The proportion of population covered by created isochrones in QGIS

I created isochrones using Iso-Area as polygons algorithm is QGIS. I would like to calculate the proportion of the population covered by the created isochrones. Is there any tool in QGIS to do this?
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1answer
129 views

Creating buffer rings of equal population size using ArcMap

I am trying to create a shapefile of equal population size buffer rings. Similar to the procedure of creating multi-ring buffers of distance around a point, find the intersects of the buffers with a ...
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1answer
51 views

Estimate population with two overlapping shapefiles

I have two levels of geography: blue polygons (18,000 districts) and black polygons (400 districts). But, I only have population data for the blue areas Is there a tool in Arc Map which will estimate ...
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0answers
24 views

Using a postcode sector map with a population attribute, create clusters of those sectors to have a total population within a defined range

I have a postcode sector map in QGIS and one of the attributes is 'population'. I am trying to create a map showing what postcode sectors would need to be clustered together in order to split the ...
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3answers
525 views

List of Most Populated US Census Designated Places

I know I can find population totals for incorporated places here, but I'm unsure where to find a similar list for census designated places. This Wiki table seems to indicate this data is out there ...
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1answer
142 views

Splitting population data proportionally using Identity tool of ArcGIS Desktop

I am preparing a term project and I have the vector data of the roads and zones layer for to prepare rural access index in Istanbul. My zones layer also has the attribute nufus17 which means ...
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1answer
154 views

Sources for population density map of Europe

I want to make population density map for EU where I can show populations of people aged about 65yrs, where can I get a EU shapefile and population Excel file? Is there any EU shape file available ...
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1answer
42 views

Which site is best to download the freely available population data of Pakistan? [closed]

I need to know the population data and households of Pakistan. but some sites like Landscan required institutional email ids which I don't have. So I need a site where I can download the data with my ...
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0answers
23 views

How to impute country to a global population grid?

Have following gridded population data (available from the History Database of the Global Environment, HYDE) ftp://ftp.pbl.nl/../hyde/hyde3.1/hyde31_final/1980ad_pop.zip It looks like this: ncols ...
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1answer
621 views

Converting gray band from dataset to RGB with rasterio for population density

I am seeking a solution that provides me a range of values rather than the provided 0 and 255 from rasterio. That most likely meant that I had to set the photometric and bands and ColorInterp to ...
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3answers
1k views

Population density: 1000 people/ km2

What does it mean when in certain publications they write population density (1000 people/km2)? Does it mean that they calculate the population density by dividing the number of people by the area of ...
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1answer
272 views

Getting population by country using Google Earth Engine

I was trying to get the population by country by using GEE. I tried the following code: // world population 2015 var pop = ee.Image("JRC/GHSL/P2016/POP_GPW_GLOBE_V1/2015"); print(pop); Map.addLayer(...
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1answer
39 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
82 views

Splitting Polygon by Population?

I'm new to GIS. I'm working on a project right now that is about assisted living facilities in my state. I have a map of my state that I've divided into six regions by creating Thiessen polygons. The ...
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1answer
300 views

Clustering of points based on 1 or 2 attributes

In QGIS: I have data of sightings of a particular animal that has been mapped as points. Some of these may be repeated sightings. I've classed the sightings according to 'SightCode' which represents ...
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1answer
241 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
123 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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0answers
141 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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0answers
145 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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0answers
322 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
77 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?
4
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1answer
220 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 ...
3
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0answers
81 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
409 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
114 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
55 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 ...
2
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1answer
304 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 ...
2
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0answers
33 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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1answer
154 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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0answers
656 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'...
2
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1answer
145 views

Transferring 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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3answers
2k views

Creating 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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0answers
35 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
88 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
1k 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
330 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
820 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
252 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
112 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 ...
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1answer
150 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?
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1answer
1k 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 ...