# Tag Info

### Population density: 1000 people/ km2

Population density is simply calculated by: Number of People / Land Area Therefore, 1000 people/km2 is the population density in your case. Often, population density is measured in km^2 or mi^2 as ...
• 51.7k
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### List of Most Populated US Census Designated Places

These data are available from the 2010 Census or the 2014-2018 American Community Survey (ACS) 5-year estimates. (1 year data are only for places with 60,000 population or more, so you need to use the ...
• 372
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### Distortion of City -Boundary-Polygons proportional to population size in QGIS?

You need the cartogram3 plugin - once installed simply select your layer and press the button. You can then style it like any other layer.
• 81.8k
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### Note QGIS raster calculator defaults to not being accurate

This seems to happen by default. The maximum you see is an estimate based on sampling. You want the actual maximum of all samples in the raster. In the Layer Styling panel, under Accuracy, select ...
• 2,100
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### Importing squares indicated through EPSG:3035 into QGIS and merge with shapefiles

You are correct, Gitter-ID are CRS3035 coordinates. To use them in QGIS, first create columns with the N & E parts of the coordinates (split column by width in Excel), and export that Excel sheet ...
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### Importing squares indicated through EPSG:3035 into QGIS and merge with shapefiles

In Excel, Add two empty columns next to Gitter-ID. Split Gitter-ID text into different column with "Data > Text to Column". Use firstly N, then E as separator/delimiter. Enter Y and X ...
• 77.1k

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

Use Vector -> Research Tools -> Random Points Inside Polygons. Select the variable, which contains the number of people in each Block (=polygon) under expression. leave sampling strategy ...
• 7,097
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### Creating population dot density map at the block group level in QGIS

Unfortunately, you can't set dot density style in QGIS (for now, I hope) as easily as you can do in ArcGIS. You can do it by creating a new Point layer. Do not expect any hope from style window. You ...
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### Population weighted centroids imported into QGIS are located off the coastline

Using the Identify tool on one of those offshore points shows that the POPULATION value is 0. Ideally, you'd overlay a map of the census blocks to see if the data makes sense. You can download census ...
• 5,052
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### Population Change

The OECD defines it as follows: The difference between the size of the population at the end and the beginning of a period. It is equal to the algebraic sum of natural increase and net migration (...
• 166
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### Estimating population in flood zones?

Population is an estimate, as it stands, so I'm assuming you are looking for a 'best-guess' type of workflow that will give the best results for the littlest amount of time spent. ArcGIS's Tabulate ...
• 3,704
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### Population centroid of irregular-shaped German counties based on a population density grid

Short answer would be "Try Mean centroid(s) in the Processing Toolbox > Vector Analysis". However, your dataset needs to get pre-processed before applying the tool. (1) Pre-process (this part is ...
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### Clustering of points based on 1 or 2 attributes

Try this: Create clusters with DBSCAN, this will create a layer (default name is Clusters) with the same number of features, but with the additional field CLUSTER_ID Collect points with the same ...

### Population density: 1000 people/ km2

They calculate the population density by dividing the number of people by the area of land in square kilometer. If you want to get in people/m2, then you have to divide the result by 1.000.000. 1.000 ...
• 77.1k

### Splitting population data proportionally using Identity tool of ArcGIS Desktop

With Make Feature Layer: Creates a feature layer from an input feature class or layer file. The layer that is created by the tool is temporary and will not persist after the session ends unless ...
• 73.8k
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### Calculating population in catchment area in QGIS

If I understand correctly, you want to know how many people live within a given time-based distance from your points. For instance, how many people live within 5min of a mailbox. Based on the ORS ...
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### USA census historical demographic data

The National Historical Geographic Information System (NHGIS) might be worth looking at. They have made available aggregate US census data and GIS-compatible boundary files.
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A Google search for "uk census spatial data" returns several results which contain datasets of census boundaries. This data could be combined with the data available on the UK Census website to create ...
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### Population Change

Usually demographers use net-migration which is the difference between in and out migration. Note in many countries (such as the UK) this is a (poor) guess as they don't have an easy way of checking ...
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### How do you aggregate attribute table data at LSOA level to MSOA level?

You need the Output Area to Lower Layer Super Output Area to Middle Layer Super Output Area to Local Authority District (December 2011) Lookup in England and Wales lookup table. OA11CD,LSOA11CD,...
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### Getting rural/urban classification from Zip Codes

There’s two parts to this.. assuming you have the coordinates (lat/lon) Urban Classification For something like this you might want to take a look at Corine Land Classification. This is a raster ...
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### Extract raster information based on polygon features

It sounds to me like the Zonal Statistics tool will work for you. I typically use Zonal Statistics as Table because it is really the tabular values that I want most (rather than a raster with a ...
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### Calculating population density from urban raster reclasiffy

Reading through your steps it sounds correct to me, although I would question Was your original dataset in meters so that your output from your first step, which you say is in meters, is actually in ...
• 29.7k

### Splitting One Polygon By Boundary of Another using QGIS?

The output clip features are showing the original block attributes, because the clip output just gives each feature the same attributes as its source feature (virtual field values become permanent too)...
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### Creating population dot density map at the block group level in QGIS

Plugins -> Manage and install plugins -> install 'Dot Map' Plugin. view -> toolbar -> dot map, then click on the dot map tool visible above where we add layers and then you could do it.

### Calculating Population Within Buffer in QGIS

What you could do is to create a buffer around those points, and then run a intersection operation between the newly created buffer polygons and your zip codes polygons. However.. your zip codes ...
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### ACS Data Interpretation

According to the variable list at https://www2.census.gov/geo/tiger/TIGER_DP/2013ACS/Metadata/BG_Metadata_2013.txt, it should be the unweighted estimate of the total population.
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### Converting gray band from dataset to RGB with rasterio for population density

If you are saying you want a grayscale 3-band image array, then np.repeat() could do that for you. # bogus 1-band image array array_2d = np.reshape(np.random.random(100), (10, 10)) # duplicate the ...
• 5,093
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### Estimate population with two overlapping shapefiles

Make feature layer with blue polygon as input and with "Use ratio policy" checked on population field Intersect the feature layer you just created with the black polygons Summary statistics (...
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