KEPLER | Source code for TACL paper | Graph Database library

There are two issues in your code block as follows:

• You need to import ChromeDriverManager from webdriver_manager.chrome
• As per Webdriver Manager for Python download_and_install() isn't supported and you have to use install()

So your effective code block will be:

• I'm finding kepplergl a painful library to work with...
• your error is expected and is not a bug. Specifically geopandas only supports one geometry column
• what does this mean? kepplergl will be using __geo_interface__ to generate geojson from the GeoDataFrame that is then serialised to a string to pass to JavaScript code of kepplergl. This fails as the second column is a Series of complex objects that is not converted to geojson. This I have replicated below, same error in a simple MWE
• how to manage this?
  1. create two layers in kepplergl one is polygons other is points
  2. concatenate geometries to long GeoDataFrame and create one layer

Author of the tutorial here. I'm glad you enjoyed it!

This is a good question. I'm not an expert on astronomy or mathematics, but I'll do my best to answer.

Setting Speed Via Custom Property

The first thing to know is that the rotation speed is controlled by the --rotation-speed custom property. We'll be updating that value from distance * randomInt(40, 70) to a more accurate value. Right now this is set in milliseconds.

So we need to determine what value to set that custom property to.

Non-scientific caveats

I'm going to be taking a couple short-cuts in my math here:

• Kepler's law has complex math to account for the fact that most orbits are elliptical (not circular). My tutorial is using circular orbits, which makes the match simpler. (For an additional challenge you could try switching to elliptical orbits)
• Obviously real-life orbits are too slow for us to observe, so we'll need to speed them up, but make them more realistic in relation to eachother.

Determining a more accurate speed

With those caveats in mind, let's find a formula we can use. I found this helpful article which describes how to calculate circular orbital speeds: https://www.nagwa.com/en/explainers/142168516704/

Here's a JS approximation of the formula they outline in the article:

Your code needs several adjustments:

1. now zoom and center are immutable meaning you cannot change them via setState. You need to hold the mapReference as state variable to achive that.
2. leafletElement is deprecated when deriving the marker reference
3. openPopup does not expect any args. This comes from the leaflet API and not from react-leaflet

Your code should look like this:

Eclipse separates the include paths for C and C++ files. If you have a program combining both C and C++ files, the correct include paths need to be set for both languages.

Navigate to the C/C++ General -> Paths and Symbols -> Includes tab. You will see both languages (and probably Assembly) listed under Languages. Pick the correct language or when adding the path, check the Add to all languages box.

you can find a tutorial on how to dynamically update a dataset with new data here: http://vis.academy/#/kepler.gl/3-load-config

please see section "2. Replace an existing dataset with new data with the same format , keeping the current config."

Click at the bottom where it says JSON

Type in env and select Environment Variables

You also need to update your env file:

• Don't use quotes
• Don't have spaces around ='s

If for some reason this still isn't working or Environment Variables isn't an option, install this VS Code extension:

Name: ENV

Id: irongeek.vscode-env

Description: Adds formatting and syntax highlighting support for env files (.env) to Visual Studio Code

Version: 0.1.0

Publisher: Jakka Prihatna

VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=IronGeek.vscode-env

Finally, if all of this doesn't work, make sure your .env file is in the correct folder.

If Nestjs doesn't come with dotenv, you'll need to set it up yourself

I found the solution shortly after posting the question: The initial coordinates can be embedded in the config dictionary:

To get it work you'll need something like this: