Hi there,  I'm uploading a custom map to the new Maps feature and while I've had some work, this particular one (which is at the size limit - windows shows it as being  9.99 MB (10,476,055 bytes) ) sits and spins forever after I select a token size.  Looking in the javascript console I see the error

Uncaught (in promise) UnknownError: Failed to execute 'transferToImageBitmap' on 'OffscreenCanvas': ImageBitmap construction failed

Making the image a little bit smaller didn't seem to help.

fetch request to https://dice-service.dndbeyond.com/diceuserconfig/v1/get {level: 'info', app: 'feywild', userId: '108322984', source: 'client', userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWeb…KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36', …}
global-error-77ac4ca9a3113bf6.js:1 Attempting to reinitialize socket {level: 'warn', app: 'feywild', userId: '108322984', source: 'client', userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWeb…KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36', …}
(anonymous) @ global-error-77ac4ca9a3113bf6.js:1
d @ global-error-77ac4ca9a3113bf6.js:1
warn @ global-error-77ac4ca9a3113bf6.js:1
initSocket @ 5091-450c6b13be0e37bd.js:1
(anonymous) @ page-19f9090511912c05.js:7
await in (anonymous)
global-error-77ac4ca9a3113bf6.js:1 initializing games page {level: 'info', app: 'feywild', userId: '108322984', source: 'client', userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWeb…KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36', …}
7005.12834971f870d1be.js:1 Uncaught (in promise) UnknownError: Failed to execute 'transferToImageBitmap' on 'OffscreenCanvas': ImageBitmap construction failed

Link to this thread in the feedback, because I don't think the form will take that much text.

Cool - have done so - thanks for the pointer.

I kept on making things smaller and when it was down to  8.00 MB (8,399,178 bytes)  it uploaded successfully.

Further info - I'm not sure it's the MB size of the file that is causing the problem, but possibly the dimensions of the image.

I can successfully upload a jpeg that is 17664 x 22784 pixels

I can't upload 20480 x 25600 pixels, even when the file size is down at 8mb.

Quote from Mooragor >>

Further info - I'm not sure it's the MB size of the file that is causing the problem, but possibly the dimensions of the image.

I can successfully upload a jpeg that is 17664 x 22784 pixels

I can't upload 20480 x 25600 pixels, even when the file size is down at 8mb.

 

 Honestly at what point do you need that kind of resolution?  What's your rough grid size?

I am using Dungeon Draft to make a map of the town, then exporting that out to a jpeg. The map is 80 x 100 squares, and I think that's what's setting the image dimensions.  Exporting that at 10% quality gets me down to below 10MB.  I've chopped a few of the outer squares off the map and that brings the exported image down to a size that allows it to upload, so all good.

There is a setting for 'Grid PPI' which is set at 256 pixels which I just ignored as I don't know what it does.  If I drop that down a chunk would that reduce the image dimensions of the exported jpeg?

PPI is points/pixels per inch, like DPI being dots per inch.  Gven that grids are all 1inch, yes definitely, reducing the number of pixels in a given grid cell would reduce the resolution of the image.  

256 pixesl per inch, at 100 squares, is 25600 pixels across.

Cool - I can just crank that number down then and make things lots easier!

Thanks!