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 Background image size limits?

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StoneC0ld1



Anzahl der Beiträge : 35
Anmeldedatum : 03.03.11
Ort : Winnipeg, Manitoba, Canada

Background image size limits? Empty
BeitragThema: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 3:33

Ok, after a lot of off-and-on deliberation on how to actually create the image, I finally got enough of an image done that I can at least get started on my map.

However, the image will not appear in the OMSi editor. Just remains as white terrain. I'm wondering if it's simply too big...

Are there any known limits on the size (ie. the x/y pixel dimensions or file size) for the background image?
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Maerkertram



Anzahl der Beiträge : 303
Anmeldedatum : 27.04.11

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BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 9:07

Why don't you first tell us what size your image has and then we can answer if we ever had a bigger one.
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StoneC0ld1



Anzahl der Beiträge : 35
Anmeldedatum : 03.03.11
Ort : Winnipeg, Manitoba, Canada

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BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 11:24

Dimensions are 15242 x 18111, file size is 18.7MB
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Maerkertram



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BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 12:19

My one is 2800 x 5200 = 41.6MB.

Your picture is higher and wider but has a smaller size, isn't that strange? I think you don't have a .bmp!
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Jeremias

Jeremias

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Anmeldedatum : 11.06.11

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BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 16:40

An image in .bmp is not necessary, i have an image in jpeg and works fine. (4100*1600 - 2.6mb)
try to make a small map, to probe if works a small image. If it works. the size the other image is the problem.
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StoneC0ld1



Anzahl der Beiträge : 35
Anmeldedatum : 03.03.11
Ort : Winnipeg, Manitoba, Canada

Background image size limits? Empty
BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 20:50

Maerkertram schrieb:
My one is 2800 x 5200 = 41.6MB.

Your picture is higher and wider but has a smaller size, isn't that strange? I think you don't have a .bmp!

Yeah, it's a jpeg... Jpeg is compatible with it, since one of my individual screen captures from Google Earth did work properly when I selected that as a test.

Perhaps I'll try converting it to a bitmap, see what happens.. But I'm really thinking I'm going to have to find a way to only use the imagery from one route at a time, since the image I'm trying to use covers most of several different routes that I was hoping to model at the same time. The imagery needed is so big that it's been nothing but problems just trying to stitch it all together into the one single image I need...

Here's another thought... Do I need to have enough tiles in place to cover the entire image first? Or should I be able to load the image in place and add the tiles I need after?

Anyway, here's the image for reference....
http://lightupload.net/files/lhLqy1310157664.html

I'm really starting to believe that my only choice to create these routes is to create them entirely freehand, without the background image at all for reference... And if it came down to that, I think I'd rather just forget about making my own real city and make a fictional map instead...
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Maerkertram



Anzahl der Beiträge : 303
Anmeldedatum : 27.04.11

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BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 21:01

Take jpeg if it works, I had problems with that.

But it could really be that your image is just too large, I mean it is 20 times bigger than my one and my one covers a height of >15km. Can you make a copy of your image and then resize it to half height/width and check then?

The number of tiles does not matter. I have placed my image when I had my first tile.
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StoneC0ld1



Anzahl der Beiträge : 35
Anmeldedatum : 03.03.11
Ort : Winnipeg, Manitoba, Canada

Background image size limits? Empty
BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeFr 8 Jul - 22:10

Maerkertram schrieb:
But it could really be that your image is just too large, I mean it is 20 times bigger than my one and my one covers a height of >15km. Can you make a copy of your image and then resize it to half height/width and check then?

Wait... Something isn't adding up... My image is supposed to cover a very similar kilometer height as yours apparently is, yet mine is vastly bigger...

I'm beginning to think I created the image on an entirely incorrect scale...

As I interpreted the directions given to me on a previous thread in this forum on the subject, I created the image using the scale indicator covering a distance of 220 feet.

This implies to me that that scale is wrong... Should it be meters? What would you recommend for the scale indicator (on the bottom left corner of the screen in Google Earth) to capture the images at?

EDIT: Yeah, I just went back and looked at my other thread.... It said to use a scale of 219 meters, and I used approximately 220 feet (oops!), making it several times bigger than necessary.... But before I go and recreate the image from scratch, is that still the recommended scale?
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Maerkertram



Anzahl der Beiträge : 303
Anmeldedatum : 27.04.11

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BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeSa 9 Jul - 9:49

I don't know what you mean. You can choose any scale you want! That's why Omsi needs so many values to import the picture.
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Jeremias

Jeremias

Anzahl der Beiträge : 29
Anmeldedatum : 11.06.11

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BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeSa 9 Jul - 22:48

Use google maps images, i recomend in map mode, not satellite.
Zoom 100m/200p ---> 320pix X 320pix = 300m X 300m =1Tile
Zoom 200m/500p ---> 160pix X 160Pix = 300m X 300m = 1Tile
Zoom 200m/1000p ---> 80pix X 80pix = 300m X 300m = 1 Tile
Count your map tile and see which is more convenient.
Regards.
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StoneC0ld1



Anzahl der Beiträge : 35
Anmeldedatum : 03.03.11
Ort : Winnipeg, Manitoba, Canada

Background image size limits? Empty
BeitragThema: Re: Background image size limits?   Background image size limits? Icon_minitimeDo 14 Jul - 6:44

Maerkertram schrieb:
I don't know what you mean. You can choose any scale you want! That's why Omsi needs so many values to import the picture.

I mean, maybe the scale I used made the image so big that OMSI just can't read it... It's so big, I couldn't even cover everything in one image, because the image stitching application would break....

You said your image covered a height of more than 15km. Mine covers a height of a bit over 15km, and a width of maybe a bit over 15km. Yet the height of mine is 5 times bigger than yours, and the width is about 3 times bigger....

Maybe recreating the image with 220 meters per the same number of pixels will make the image small enough to work with.... Or maybe Jeremias' suggestion may help may help... I'll have to mess around with it later when I have time...

EDIT: Ok, I tried recreating it on Google Maps, even managed to get the image down to 11,000-12,000 pixels in each direction... Still doesn't work....

The top left corner image does work (had to create the whole image by stitching together 4 smaller ones), so it appears that I just need to figure out a way to create this map using one image at a time instead of one big one...
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