Tagged Questions

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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-2
votes
0answers
38 views

Totaling Population within A Polygon

I am trying to count total populations within several arbitrary polygons using census block data. How can I get a total number per polygon?
3
votes
1answer
309 views

Is there a way to get accurate daily U.S. populations? [closed]

I suppose you could interpolate from the Census data, but I am interested in a data feed that has accurate DAILY total population of the U.S. The finer the granularity, the better (so if there was ...
2
votes
2answers
65 views

Census Data Intersection with Unique Boundaries

Basics: I have a country wide dataset of Census blocks, I need to find the population of unrelated boundaries that do not ALWAYS follow census blocks. I would like to use Select by Location-centroid ...
0
votes
1answer
108 views

QGIS: Multiply Raster Value with Pixel size

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 ...
3
votes
1answer
139 views

Calculate population coverage?

I am relatively new to QGIS and hope I explain this right. I am looking at the percentage of an population that has geographical access to healthcare. Therefore I have one shapefile with village ...
0
votes
0answers
61 views

world city database (with lon,lat) & population per year

I'm building a visualisation with cities population around the globe for a website, found the MaxMind free database that includes most cities around the globe with coordinates and population, which is ...
1
vote
1answer
56 views

Population by Census Tract

I am looking to obtain count of population by census tract. The ideal output would be Census Tract 1919.01 Population = 7,435. Does anyone know of resources where I can get this information. I tried ...
0
votes
0answers
148 views

How to calculate a population weighted centroid using a raster and shape file 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 shape file based on a large population and shape file. I have successfully created ...
2
votes
2answers
87 views

How to interpolate population data?

I have population data (inhabitants per city and year) of 31 cities of the DR Congo for the years 1960, 1970, 1980 and 1990. I want to interpolate the population of all cities for the year 1990, to ...
1
vote
0answers
156 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 ...
3
votes
2answers
68 views

Prediction Population

I want to build a continuous data set with the population for 1970, 1981, 1991, 2001, 2011. I already have the population values for the same polygon, at sub-sections level (the lowest), for 1991, ...
0
votes
0answers
60 views

Directly Proportional Hexbin Cartograms in QGIS

I've been using Scapetoad to create population cartograms, which I then convert into hexbins back in QGIS. However, the Scapetoad software seems to create cartograms that are affected, but not ...
2
votes
5answers
138 views

Linking demographics data to zip code, census data

Where do I find population data to link to DMA / MMA or zip code? I need to be more granular then state. Any free data source? ArcGIS?
0
votes
1answer
47 views

Where can I find human migration data? [closed]

I am looking for data to create a flow map. I need data showing the migration of people either within a country, or internationally.
1
vote
1answer
208 views

Python problems with select by attributes and user input

I am attempting to create a tool where the user can input a census tract number within the city of Plano (there are 77 tracts) and it ultimately creates a map layout showing the population density. I ...
1
vote
1answer
25 views

How to Compress/Stack Landscape features to examine spatial distribution and fragmentation?

I was wondering if anyone could help me figure out how to compress landscape information from multiple rasters (or polygons) into a single output. Basically, I want to explore how landscape ...
0
votes
1answer
133 views

Automating calculation of Population Density in Census Tracts?

I am quite new to Python and I am attempting to practice by making a simple program with ArcGIS. I wanted to make a script that automated the calculation of population density of selected census ...
3
votes
1answer
126 views

How to best determine the future location of a Fire Station?

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 ...
1
vote
0answers
576 views

India population by town: 1981, 1991, 2001, 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 ...
1
vote
0answers
134 views

How to create a buffer around a point that takes terrain elevation in account?

In QGIS, I am creating a few different buffer around points to simulate walking distances. For example, 10 minutes walk about 800m at 5km/h. Using population density, I then clip a population layer ...
3
votes
1answer
304 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 ...
2
votes
0answers
41 views

Distribute population to health facilities (GP Practices)

I have been using GIS (ArcGis) for some years but I do not consider myself an expert. I am performing some analysis around GP Practices in London (UK), I would like to be able to estimate the ...
2
votes
1answer
94 views

US Census Data - An orderly means of deducting the area-weighted population of segments of incorporated places from the population of counties?

I'm working in ArcMap 10.1. Currently examining the segment of states with a geographical hierarchy of Counties, coextensive with state boundaries Within counties, unincorporated areas and ...
7
votes
2answers
259 views

Where can I find Population data for all UK Counties?

Where can I find population data (male, female, total) for all UK counties for last 7 decades, i.e. 1950,1960,1970,1980,1990,2000,2010. I tried my luck with Office for National Statistics and UK ...
1
vote
1answer
144 views

estimated population around a point qgis

I have a shapefile with points distributed in a polygon. The points are post office locations within a census district. How can I estimate if the post office is a representation of the concentration ...
6
votes
2answers
387 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
votes
2answers
1k views

Calculate dynamic radius based on population and map resolution

Background Create a radius around the centre of a city that corresponds to the city's population, taking into consideration the map's current resolution. The populations range from 39 to 1090936, ...
1
vote
0answers
54 views

trim a global quadtree by population density?

I'm looking for a way to match people so as to find other members that are 'nearby' - not for those dreadful 'girls near you' ads, don't worry ;_) Of course 'nearby' in the country is a different ...
4
votes
1answer
445 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 ...
2
votes
1answer
122 views

Plugging in population data into a map of provinces

Have shapefiles for provinces in several countries in an Asian region, but currently trying to plug in animal population data for each province with graduated symbols displayed the data. Am trying to ...
5
votes
2answers
227 views

Worldwide population density data not grouped by country?

Are there any data sources available, preferably freely (but not necessarily), which show population density without regard to country or constituency boundaries of any sort? I'd like to analyze a ...
4
votes
3answers
856 views

What is the highest resolution of population density data that I can obtain for USA freely?

Ok so as far as my understanding goes the most high resolution dataset available that factors in many other things (other than Census data ) at a 1X1 km resolution is Landscan data created by Oak ...
3
votes
4answers
728 views

Algorithm for finding population for a given center point and radius in US

Here is what I have The population data aggregated by zip code given by US Census. Here is what I am doing right now: Reverse geo code the center point to find the zip code of the center point. ...
7
votes
5answers
499 views

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?
6
votes
2answers
168 views

What multiplier would you use for calculating estimated population?

Given a number of address points in a given area, what multiplier would you use for calculating estimated population? I have seen 2.5 in a few places, but I was wondering what the generally accepted ...
11
votes
3answers
959 views

Distribution of Human Population with Altitude

I recently found Joel E. Cohen and Christopher Small's work on hypsographic demography, i.e. the distribution of human population with altitude. Does anyone know of any other research in this area? I ...