topojson | Encode geographic data as topology in Python | Map library
kandi X-RAY | topojson Summary
kandi X-RAY | topojson Summary
Encode geographic data as topology in Python!
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Top functions reviewed by kandi - BETA
- Joins the data
- Explode segments
- Compares two bounds
- Compute the bounds of an array
- This function is used to hash the data
- Resolve ArcGIS
- Resolve a bookkeeping_coords
- Recursively resolve objects
- Do the deduplication of the curves
- Remove duplicate linestrings
- Merge contiguous arc segments
- Return a new array with the given replacement values
- Extracts the intersection point for the intersecting box
- Create a numpy array from nested lists
- Get the linestring types for each object
- Flattens a list of slices and index pairs
- Return the topology as a dict
- Serialize a topology to a topology
- Serialize the geometry as an Altair
- Serialize the graph to SVG
- Serialize the graph to a svg file
- Serialize to SVG file
- Serialize to Altair format
- Run the topo algorithm
- Calculate shared segments
- Convert to svg
topojson Key Features
topojson Examples and Code Snippets
Lines of Code : 2License : Strong Copyleft (CC BY-SA 4.0)
Copy{"id":49,"type":"Feature","geometry":{"coordinates":[[[[25.134789950981,65.0613390595066],[24.9509796014637,65.1411214235741],[24.1149334366251,65.1739425977789],[24.1374948169974,65.2416484128856],[24.6071512739822,65.211492673253],[25.22# remote geojson data object
url_geojson = 'https://raw.githubusercontent.com/mattijn/datasets/master/two_polygons.geo.json'
data_geojson_remote = alt.Data(url=url_geojson, format=alt.DataFormat(property='features',type='json'))
# chart oimport json
with open('/path/to/your/italy-provinces.json') as f:
data = json.load(f)
print(data)
print(data.keys())
#dict_keys(['type', 'arcs', 'transform', 'objects'])
print(data['objects'])
fill_color: string, default 'blue'
| Area fill color. Can pass a hex code, color name, or if you are
| binding data, one of the following color brewer palettes:
| 'BuGn', 'BuPu', 'GnBu', 'OrRd', 'PuBu', 'PuBuGn', 'PuRd', 'Rdfor country in countriesAndContinents_json['features']:
if country['properties']['Name'].lower() == h_country.lower():
if highlightFlag == 'License A':
return folium.GeoJson(
points ={
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
32.73684,
39.85925
],
[
32.73575,
folium.Choropleth(
geo_data=mexico_city_map,
data=mexico_city_map,
columns=['Distrito','NumberofTrips'],
fill_color='BuPu',
fill_opacity=0.3,
line_opacity=1.0,
).add_to(m)
folium.Choropleth(
geo_path = zip_geo,
data = df_zip,
columns = ['Zipcode','Ticket_Count'],
key_on = 'feature.properties.external_id',
fill_color = 'YlOrRd',
fill_opacity = 0.7,
line_opacity = 0.2,
legendimport altair as alt
from vega_datasets import data
airports = data.airports()
states = alt.topo_feature(data.us_10m.url, feature='states')
selection = alt.selection_interval()
# US states background
background = alt.Chart(states).mark_g# creating folium GeoJson objects from out GeoDataFrames
pointgeo = folium.GeoJson(gdf,name='group on map', show=False,
tooltip=folium.GeoJsonTooltip(fields=['Name', 'Relation', 'City'], aliases=['Name','Relation', 'CCommunity Discussions
Trending Discussions on topojson
QUESTION
I'm making a bubble map similar to this one: https://observablehq.com/@d3/bubble-map
Everything is working except that my smaller bubbles are not always showing on top of the larger ones. I can't see why, as I've sorted the data before drawing the circles. Can anyone see what I'm doing wrong?
Here is a plunker: https://plnkr.co/edit/JKWeQKkhN2TQwvNZ?open=lib%2Fscript.js
Code is below. The other files are too large for stack overflow but can be accessed via the Plunker.
...ANSWER
Answered 2021-Jun-08 at 00:26I would suggest you to split your data to a couple separate datasets grouped by size and create distinct group (g element) for each one. This will also fix issues with circles highlighting.
I slightly updated your plunker to make it work as described (check the lines 91-167) https://plnkr.co/edit/rayo5IZQrBqfqBWR?open=lib%2Fscript.js&preview
Also check the raise and lower methods. They might be a good replacement for your moveToFront and moveToBack methods.
https://riptutorial.com/d3-js/example/18029/svg--the-drawing-order
QUESTION
I have created a worldmap using the d3 and now able to create the specific countries to have hover effect , however I have also created the tooltip what I want to do now is to get the country map in the tooltip (the country which is hovered) i have used d3 v4 to do all this.
I have made changes suggested by CodeSmit but it seems I'm missing a lot of things.
...ANSWER
Answered 2021-May-21 at 15:04The .html method on D3 selections first deletes anything that's already inside those elements before setting the new contents. Thus, to initiate an element's base HTML content with .html, be sure to call it first before adding anything else to the element, and also do not call .html later on, or risk it overwriting anything that was added to it.
You're close. You've got a number of issues though.
1. d3-tip Not UsedYou're including the d3-tip library, but you're not making real use of it at all. Because of this, it's adding to the confusion. You have your own
Your "mouseover" event fails to add the country SVG element for two reasons:
First, because you're selecting the #tipDiv element which never appears since it's part of the d3-tip code that doesn't get used. To fix this, I think you want to select the div.tooltip element instead. Since you already have the 'tooltip' variable set to this, you don't need d3.select; you can simply do:
QUESTION
I'm having some difficulty getting d3 to render a geoAlbersUsa projection from topoJson data. I'm showing a blank screen, but no errors returned. The geoJson data seems to be coming through fine, but it's not rendering the path for some reason. Any help would be greatly appreciated!
Here's the relevant code:
...ANSWER
Answered 2021-Apr-29 at 14:43You need to join with an element:
QUESTION
I am trying to add pop_april_2010 values associated with each County to the map. However my code only returns the base map when I don't include the line "color='pop_april_2010:Q'". Including the line results in an empty image without the map.
Dataframe - df
The data is from Kaggle > https://www.kaggle.com/camnugent/california-housing-feature-engineering?select=cal_populations_county.csv
Code
...ANSWER
Answered 2021-Apr-28 at 01:45The reason the chart is empty when using color is that the wrong column name is used in the lookup of the topojson file, so nothing is returned and you are passing a string referencing a non-existing column to color. If you inspect your topojson file you can see that each county's named is stored in the NAME attribute, not County.
Further, if you compare your topojson to what is in the vega sample data (for easier comparison paste them into a json viewer) you can see that the key used in the sample data file for the lookup example (id) is at the top level of each geometry object while in your fie it is nested one more level under properties. This means that you need to use 'properties.NAME' as the lookup string (more details about working geogrphical data in this answer):
QUESTION
I am using Angular based Storybook. All I wanted to do is to re-render the chart based on the values given in the Storybook's control. But the Chart remains static even after changing the value of the control. I tried so many workarounds, but still am at square one. The chart I wanted to display is a choropleth. I have used Chartjs and chartjs-chart-geo library to display the chart.
My component in Storybook :
...ANSWER
Answered 2021-Mar-25 at 15:12The getGeoData method which sets up the chart is called only during component initialization and it wont run when @Input values change. For these scenarios Angular provides ngOnChanges lifecycle hook. And this is where we need to tell Angular what needs to be done when @Input values change.
QUESTION
In my project, I am trying to display the India map using d3 and GeoJSON. It does not work properly, I am finding it difficult to display each Indian state. Please help me to find out, thanks in advance..., I have added a link to the data and output below the code.
This is my source code and I am using data from https://www.covid19india.org/mini_maps/india.json and I want to render (Indian states) using D3.js
...ANSWER
Answered 2021-Mar-14 at 06:22Hi I used to have a website called covid19news.org. Which is now down. There I have worked on something similar. the code is like below.
QUESTION
ANSWER
Answered 2021-Mar-07 at 14:52Your topojson API needs to have type and geometries defined. You can then use this data in your projection.
My typical set up looks like this:
QUESTION
I want to create a US map based on county data. I'm using this JSON topology data to create the graph: https://cdn.freecodecamp.org/testable-projects-fcc/data/choropleth_map/counties.json
In the first step, I created the map like this, and it works fine:
...ANSWER
Answered 2021-Mar-09 at 07:23Everything looks good in the second block of code (using d3.geoAlbersUSA()) except I think you are zoomed in too close with .scale(200) and only seeing the middle of a county. As explained in this post, if you zoom out with smaller scale value you may start to see more of your map.(What does it mean to scale a projection in d3?) You may be better off using .fitSize() instead of .scale since you seem to be trying to fit the whole topojson data set inside an area rather than zooming into part of it. Updated your example below using a variable margin.
QUESTION
My TopoJSON object contains 3 polygonal sub-objects of which the first D2P1 appears with the geometry correctly drawn on the OSM map, but the other 2 polygons D2P2 and D2P3 are drawn distorted on the map turning into projected lines instead of their! correct geometry. Could you help me to write my code correctly so that my 3 polygons appear correctly configured?
...ANSWER
Answered 2021-Feb-05 at 07:23I LEAVE YOU THE CODE THAT ANSWERS MY QUESTION, I HOPE IT WILL BE VERY USEFUL
QUESTION
I have a world map build in D3.js For performance's sake I am using world-atlas 110m version, but I want to increase the map detail as I zoom in.
I also want to change projection and, therefore topojson file when I click on the United States. (That is to use geoAlbersUsa(), and render US states)
I've got some very basic functionality on changing the map projection on click, but I am struggling on how to change the topojson file.
...ANSWER
Answered 2021-Feb-05 at 04:47If you want to change features/data source/whatever with zoom, you'll need to get the current zoom state, which is contained in the the event passed to the zoom event listener (or d3.event before d3 v6).
This gives us a relatively easy zoom listener:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install topojson
numpy
shapely
altair (enlarge the experience by visualizing your TopoJSON output)
simplification (more and quicker simplification options)
geojson (parse string input with GeoJSON data)
geopandas (with fiona version >=1.8.6!, parse your TopoJSON output directly into a GeoDataFrame)
ipywidgets + (lab)extension (make your life complete with the interactive experience)
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