Questions tagged [h3]
The H3 geospatial indexing system is a multi-precision hexagonal tiling of the sphere indexed with hierarchical linear indexes.
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Numbering H3 Polygon Elements Sequentially for Easy Map Identification
I've a high quantity of H3 hexagons that I would like to make them easily identifiable on a map by assigning sequential numbers starting from 0 based on their location.
I'm using the field calculator ...
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H3 Hexagon Geometry join on MSA Geometry
I have a pandas DataFrame with h3 hex ids and corresponding Polygon geometries and a geojson file with Texas Metro Area Geometries.
I'd like to join the H3 hex ID to Metro area and identify which ...
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Visualize uber h3 hexagon in Power BI
I have two columns. One is h3 index and other is quantifying column. I have converted each hexagon into WKT. I am not sure how I can display hexagons over a map in Power BI.
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Load and Display already H3-JS binned dataset in Openlayers
I have a website that uses h3-js to bin the points and store them in a geoJSON file. Then I call a function that counts the number of points in each of the hexagons after the H3-JS hexabinning and ...
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Correctly render multiple hexagons on Mapbox
I have a GeoJSON of hex indexes, which I am trying to render on to Mapbox.
Here is my code (ignore the indentation):
export default class App extends Component {
constructor() {
super();
...
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How would I display H3 hexagons on top of Mapbox GL React native
I want to make an interactive app where users can view crime rates in their area by pulling in geo-data from the met police website.
I have gotten the Mapbox map to display but I am trying to figure ...
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Openlayers H3 Binning works but map only displays on page load
I focused on an example of H3-JS binning work on Mapbox map canvas.
https://gis.utah.gov/developer/applications/suitability/
However, I wanted to work with Openlayers map. With some help I was able to ...
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Convert output of h3_distance() to km in SQL
H3's documentation states that the H3_distance() function returns "The distance between two H3 cells, expressed as the minimum number of hexagon 'steps' required to get from the origin to the ...
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730
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Implementing H3-JS in Mapbox based map to Openlayers based map
In the H3-JS example I have, it is implemented in mapbox. But I would like to integrate the H3-JS binning as part of Openlayers map instead.
This is the example I want to implement in OpenLayers. ...
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Get all h3 indexes within a polygon in PostGIS
Using PostgreSQL 14.5, PostGIS 3.3 and OSM data, with Uber h3 extension for PostGIS I am trying to get all hexagons within a certain boundry of polygons.
This SQL query:
SELECT h3_polygon_to_cells(...
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How to obtain the minimal covering of a circle with H3 hexagons?
Given an EPSG:4326 lon,lat coordinate pair, and a radius r in meters, I want to find the smallest set of H3 hexagons at resolution res that completely covers the circle centered at lon,lat with radius ...
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Executing Geojson2h3 on the browser without Nodejs
I am trying to execute Geojson2h3 on the client browser without Nodejs. I have imported the 'geojson2h3.js' javascript file.
However, I am getting an error with the following code.
I am hoping that ...
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Why is h3.polyfill(geojson, 15) returning empty list for this polygon?
I have a polygon the size of an office block in WGS84 coordinate system.
When I run h3.polyfill at resolution 15 it should return a large number of h3 res15 addresses whose centroids are contained in ...
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PostGIS/PostgreSQL Heavy performance issues with SUM
Not sure if this is specific of GIS stuff or simply a SQL performance issue, but due to the nature of the issue and that I am working with H3 data types here it goes
I have a query that runs very ...
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Converting line to set of H3 hexagons?
What is a proper way to convert a GeoJSON linestring to a set of H3 hexagons?
I came up with an algorithm where I
extract points from a line,
calculate an H3 hexagon of these points geo_to_h3
connect ...
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h3 grids wrapping around projected map
I am trying to create a map out of a file with millions of points. To make this tractable, I am using h3 to aggregate the points. After doing the aggregation using a combination of h3 and pandas in ...
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Distorted h3 hexagons using h3js with Mapbox
When a user clicks on a Mapbox streets-v11 map, I'm attempting to:
Take the clicked point, and identify the h3 hexagon (at resolution 10) around the point
Convert the hexagon coordinates into the ...
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h3_to_polygon (R) to Python?
I am looking for a way to convert H3 hex-ids (e.g., '87422c2a9ffffff') to Polygon geometry. In R, we would use:
h3_to_polygon()
But I am having a hard time finding the equivalent in Python.
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H3-Python: How to generate hex bins over shapefile?
I am trying to generate hexbins over my shapefile to eventually cluster other geospatial events to them using H3. Here is my process, but I am wondering if there is a better way.
# packages
from h3 ...
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How to convert GeoJSON points to H3 hexagons in Python
I am trying to take a geojson file of points and convert it to H3 hexagons in my Python script. In JavaScript, there is a separate package called geojson2h3, but the Python h3 module has a method ...
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Uber H3 DGGS: Table of largest hexagons per resolution?
I'm evaluating the use of H3 as a DGGS for a project, and so far I've been unable to find any reference of the area of the largest and smallest hexagons in the grid at each resolution. The "official" ...
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Distorted H3 hexagons - even though projection is matching
Using H3-py's h3_to_geo_boundary a WKT linestring (via shapley polygons) can be generated.
When later visualizing the hexagons, why are they distorted? How can this be fixed?
To my best knowledge, ...
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Using Uber H3 hexagon grids in QGIS
How can I create a spatial binning similar to or directly using Uber h3 from QGIS UI?
Are there plugins available to achieve the desired task?
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Seeking shapefile of hexagons that covers world?
I'd like a persistent .shp that covers the world in hexagons (preferably of a decently small area)–does anybody know where I could find something like this, or perhaps what software I could use to ...
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