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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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 ...
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WorldPop 2020 age structure Jakarta
I am trying to download population data for a bunch of world cities using WorldPop/GP/100m/pop_age_sex_cons_unadj data set.
It has has worked for all the cities I'm looking at except Jakarta.
In the ...
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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 ...
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Clip and return numerical amount of population density
I have 2 layer data. 1st is the choropleth data of population density per sub-district (in gradient color of red to white). And the 2nd is the service area of ambulance service (in the color of green)....
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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 ...
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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/...
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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 ...
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Calculating tract growth rate
Trying to calculate growth rate from the year 2000 to 2021. The only bump I'm coming across are the missing tracts. Main issue being where one tract in 2000 would be split into two for 2021. I am ...
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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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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 ...
- 64.6k
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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How to calculate purchasing power on postcode level?
Does anyone know of an algorithm to calculate purchasing power on a postcode level? What source data is needed? Purchasing power on admin. level, population?
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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 ...
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How to use 1km2 or 10km2 vector grid to classify urban areas in a population grid raster data?
I have:
A population density grid raster file converted to point shapefile.
And a vector grid and used zonal statistics to estimate the total population in each grid cell.
I want to mask out or ...
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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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How do I tell if a higher rate of (whatever) is due to higher population, or if its actually significant?
I hope that makes sense-- it's a bit difficult to word. We all know that more stuff happens in the places with more people, and less stuff happens in places with less people. What are some strategies ...
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Population data rendering differently per file
I'm trying to compile all the various population density .TIFF files from Meta into one QGIS file but each tile seems to have a different scale. I can't figure out which variable I need to change to ...
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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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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 ...
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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 ...
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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?
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calculate the population inside a buffer with census data
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, ...
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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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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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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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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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how can countrymeters.info be true?
I'm wondering, how this site countrymeters.info manages to gather information?
They are displaying, as example "Net migration today" and information is updated real-time;
A few hours ago it ...
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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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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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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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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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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 ...
- 64.6k
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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, ...
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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 ...
- 64.6k
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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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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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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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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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2
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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 ...
- 63.7k
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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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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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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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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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Getting accurate daily U.S. populations [closed]
I suppose you could interpolate from the Census data, but is there a data feed that has accurate DAILY total population of the U.S.?
The finer the granularity, the better (so if there was daily ...
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