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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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Heatmap with population and travel time using ArcGIS Pro

I have two different layers one which consists of polygons that represent travel time (15, 30, 45) and another which contains demographic information. I want to create a heat map similar to this that ...
A. Cervantes's user avatar
0 votes
0 answers
46 views

Finding out how many people are affected by rail noise in Florida using ArcGIS Pro

I have a TIGER rail line file and the census block layer for Florida. I clipped the rail line file to only have rail lines in Florida, added a buffer to approximate the area extending off the rail ...
Rob's user avatar
  • 1
3 votes
0 answers
64 views

Population clustering from Raster using ArcMap

I have a raster image with different pixel values, each one representing the number of people living in the pixel. I want to cluster the pixels based on the sum of the pixel values equaling 1000 in ...
Sahan Sankalpa's user avatar
0 votes
0 answers
69 views

How to calculate population per cell in QGIS

I am a beginning to QGIS and I am working on a project on the number of population affected by flood. I have a vector layer of district boundary joined with the population census data (csv, no ...
user226259's user avatar
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0 answers
45 views

Reducing the resolution of population data but getting 1.5x the actual population values

I am trying to reduce the resolution of a raster to the resolution of another dataset for later processing. In other words, I would like to reduce the population image by summing the number of people ...
margie's user avatar
  • 15
3 votes
2 answers
118 views

Population weighted centroids imported into QGIS are located off the coastline

I am new to QGIS. Imported the census population weighted centroids shape file retrieved from NHGIS as a vector layer into QGIS and they are nearly always where I would expect them but a sprinkling of ...
ClaireR's user avatar
  • 31
1 vote
0 answers
61 views

Population density grid confusion

I have a multi polygons data where red means most populated and white means less populated. I created a gridded population density (image on the right) out of them, but the result seems not quite make ...
Jack Zaki Zakiul Fahmi Jailani's user avatar
2 votes
1 answer
189 views

Download WorldPop data (100m) in R

I am trying to download population count data (100m pixel size) from WorldPop using the R package wpgpDownloadR. The code: # install.packages("devtools") devtools::install_github("wpgp/...
Nikos's user avatar
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1 vote
1 answer
36 views

How to colour categorise population estimates using GRID3 Settlement Extents in ArcGIS Pro [closed]

I am new to ArcGIS Pro and geospatial data in general. I have downloaded settlement extents data from https://grid3.org/. I had naively thought the data would display the population in a heatmap like ...
Mizzlwe's user avatar
  • 11
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0 answers
25 views

Estimate population of Nabweru subcounty using composite image of night time light from VIIRS ,NDVI and LST using Google earth engine

am currently doing a research project due for presentation and its effectiveness in estimating population using nighttime satellite imagery. a case study is Nabweru sub-county KLA uganda. I was to use ...
Joe Walubi's user avatar
-2 votes
1 answer
98 views

How to only get the population per country with World Bank Open Data

I try to get the population of every country with an API, but I looked at the World Bank Open Data but I can't find just the population of each country. I looked, and I find lots and lots of data ...
Eli-ott's user avatar
  • 101
3 votes
2 answers
212 views

Importing squares indicated through EPSG:3035 into QGIS and merge with shapefiles

I have some data on population estimates in Germany for 1km by 1km squares. (Data can be found here: https://www.destatis.de/DE/Service/EXDAT/Datensaetze/bevoelkerung-geo-mobilfunkdaten.html when you ...
romanowski's user avatar
0 votes
0 answers
122 views

US population data entity at a level of granularity smaller than zip code tabulation area? Neighborhood, housing tract, section of town, etc

Is there a data entity that would correspond to population clusters within a zip code tabulation area? Something that would correspond, even if only roughly, with a neighborhood or housing tract or ...
Tim's user avatar
  • 121
2 votes
1 answer
533 views

Calculating population in catchment area in QGIS

In QGIS 3.22.0 (Biatowieza) by means of the "OpenRouteService" Plugin I was able to get isochrones for my point layer. The "ORS Tools" Plugin calculates the population within the ...
rtaani's user avatar
  • 557
1 vote
2 answers
424 views

QGIS - How to split and display Population Data according to District/Province?

I'm a complete beginner in QGIS, currently self-teaching myself through Youtube. Current Problem: To split and display population data according to district/province Project Background: To measure ...
Senpai-C's user avatar
1 vote
1 answer
532 views

How do I calculate population within radius on Google Earth Engine?

I'm trying to calculate the population within a specific radius within a specific country using Google Earth Engine. My plan is to use reduceToVectors to convert the population values into a ...
geor4nge's user avatar
1 vote
1 answer
527 views

How would I calculate the sum of the values of a band around a specific pixel in Google Earth Engine?

I'm trying to calculate the population within a certain radius around a specific pixel, but I don't know how to define the geometry of the region to reduce. This is what I would imagine it might look ...
geor4nge's user avatar
0 votes
1 answer
261 views

Calculating population of only urban areas from a raster layer

I have a raster file of population data downloaded from www.worldpop.org. I also have a shape file of township polygons but what I am trying to do is to only calculate population of urban areas not ...
Witt Yee's user avatar
1 vote
0 answers
32 views

Rounding imprecision when performing area-weighted interpolation of population (discrete) data

I guess this is more a conceptual question. I'm performing area-weighted interpolation between two very granular geometries, and I have three variables: population_total, population_men and ...
Kauê Braga's user avatar
0 votes
0 answers
67 views

Does GADM have level 2 population data availability for African countries

I was wondering if GADM have level 2 population data availability for African countries (as many years as possible)? If not, would anyone know other resources that may have?
Christian Holm's user avatar
1 vote
1 answer
98 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('...
Emma's user avatar
  • 61
1 vote
1 answer
346 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 ...
Kamel Rajjoub's user avatar
1 vote
2 answers
903 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 ...
Kamel Rajjoub's user avatar
-1 votes
1 answer
299 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 ...
Trisha's user avatar
  • 9
1 vote
1 answer
171 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 ...
GISNoob's user avatar
  • 13
4 votes
2 answers
708 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 ...
JohnH's user avatar
  • 63
0 votes
1 answer
45 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?
Mohamed Ghayth Chihaoui's user avatar
0 votes
1 answer
191 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 ...
Gereon Rath's user avatar
-1 votes
1 answer
520 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 ...
Dom McEwen's user avatar
0 votes
0 answers
282 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?
Elham's user avatar
  • 419
1 vote
1 answer
380 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 ...
ALCZ's user avatar
  • 13
2 votes
1 answer
139 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 ...
Kerri's user avatar
  • 23
1 vote
0 answers
72 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 ...
MapMan's user avatar
  • 29
-1 votes
4 answers
2k views

List of Most Populated US Census Designated Places [closed]

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 ...
John Roberts's user avatar
2 votes
1 answer
337 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 ...
Berke Şentürk's user avatar
1 vote
1 answer
781 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 ...
geoak's user avatar
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1 vote
0 answers
54 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 ...
Zoltan Navy's user avatar
1 vote
1 answer
1k 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 ...
acwpython's user avatar
  • 131
2 votes
4 answers
3k 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 ...
Grace 's user avatar
  • 31
3 votes
1 answer
728 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(...
pmj's user avatar
  • 81
1 vote
1 answer
58 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 ...
Drew Heiderscheidt's user avatar
0 votes
0 answers
140 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 ...
Mike Silva's user avatar
5 votes
2 answers
1k 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 ...
Caragh's user avatar
  • 51
4 votes
1 answer
507 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?...
flx_adam's user avatar
0 votes
2 answers
483 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). ...
philsch's user avatar
  • 337
0 votes
0 answers
325 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 ...
JAGRITI's user avatar
  • 21
1 vote
0 answers
153 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 ...
ldreher's user avatar
  • 11
0 votes
0 answers
443 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 ...
Benjamin Zhu's user avatar
-1 votes
1 answer
105 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?
Cindy's user avatar
  • 11
5 votes
1 answer
349 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 ...
Boudy's user avatar
  • 53