mercator | produce graph model projections of infrastructure | Graph Database library

I'm using VegaLite and VegaDatasets to show a Mercator projection of the world map, and plot a point at a specific latitude and longitude. So far, this works to produce the map:

I recently started using the stars R package. I'm struggling with reassigning NA values to "Unknown". I found a potential solution here, but it doesn't seem to work on NAs. Any suggestions to fix this issue are greatly appreciated. for some reason SO doesn't like huge chunks of code without adding more information, so i'm adding some random text at the bottom.

Here's the code that I used:

I've downloaded a world map and want to change it from the default CRS (EPSG:4326) to the WGS 84 / Pseudo-Mercator projection used in applications like Tableau and Google Maps (EPSG:3857). For some reason, when I attempt the transformation, the longitude and latitude numbers become inflated.

For example, (-95.160, -95.102) becomes (-10593226.108, -10586797.584)

I've got an SVG map and I want to show a specific city using ID in HTML with specified width and height. How can I accomplish this?

Here is the SVG Image:

I'm using a Web Mercator image to cover a sphere. My shader takes a plane with an image and turns it into sphere. The only issue is that The resulting sphere ends up with countries stretched (like the united states).

I've figured out that I can use an equlateral image of earth to get the desired effect of non-stretched countries

Question

For my project I only have web mercator imagery and I've been struggling with the math for getting my shader to show countries at their correct scale. How can I transform mercator lat lon to equilateral lat lon for writing to my shader ?

NOTE

Everything I would need seems to be on this question about mercator projection to equirectangular but for whatever reason it's just not clicking.

Some Code

plane script

I would like to extract the unit of measurement (decimal degrees, metres, feet, etc.) from a spatial object in R. For example, if I have an SF data frame that uses the WGS84 co-ordinate reference system (EPSG:4326), I would like to be able to determine that the co-ordinates are specified in decimal degrees. Similarly, I'd like to be able to determine that UTM co-ordinates (e.g. EPSG:32615) are specified in metres.

I have tried using the st_crs() function from the sf package, which returns the co-ordinate reference system in well-known text format. However, I'm struggling to be certain that a regex that extracts the unit of measurement from that well-known text will operate reliably for a wide range of co-ordinate systems.

Is there an existing function that returns the measurement unit for a spatial object?

For example, the following code produces an SF data frame that uses the WGS84 co-ordinate system:

Im trying to display a France map based on the Datamaps plugin. with all the attempts i tried i couldn't succeed.

This is my HTML :

Let's say I have a GeoDataFrame with a CRS set.

I’m trying to convert a full globe Robinson Projection to Mercator. For example, I use this image.

First, I apply geo-tagging:

gdal_translate -a_ullr -180 90 180 -90 -a_srs ESRI:54030 source.jpg source_tagged.tif

and finally warp it to Mercator:

gdalwarp -t_srs ESRI:54030 -s_srs EPSG:3857 source_tagged.tif target.tif

The outcome is slightly stretched vertically but nowhere near proper Mercator. What am I doing wrong?