[WIP] Sh4Gen Tracking Room 2.0

[GlobalExplorer]

Originally Posted by Observer

Soundings.

I know water depth is shown by the color shading, but I'd like to see this converted to a contour type chart with actual soundings (based on the color shading is fine), in fathoms please.

I don't have the numbers at hand, but this can be done. The image I use is NASA BMNG bathymetry, and they have not published these information with the file. I have included depth more as a gimmick as the game lets you measure depths just fine and the focus is on things that don't become clear as long as the SHIV map station is used, as well as high res shorelines.

There are also more highres-versions but they make everything very slow, so I have stuck with a more blocky one.

[Rockin Robbins]

Whoa! This is big! I'm speechless.

[Observer]

[quote=GlobalExplorer]

Originally Posted by Observer

I don't have the numbers at hand, but this can be done. The image I use is NASA BMNG bathymetry, and they have not published these information with the file. I have included depth more as a gimmick as the game lets you measure depths just fine and the focus is on things that don't become clear as long as the SHIV map station is used, as well as high res shorelines.

There are also more highres-versions but they make everything very slow, so I have stuck with a more blocky one.

Unless I missed something, this is a planning tool. While it is possible to measure depth in game, it can only be done in the players current location. The color scheme used on the map station makes it very difficult (in my opinion) to easily distinguish depth, especially in shallow water where it is most critical. This is important for operations in the East China Sea, or the Yellow Sea where the water depth tends to be very shallow.

Honestly, I'm not sure where the data is stored in SH3/4, but water depth is one of the critical factors used in tactical planning. It can (obviously) have a huge impact on mission outcome. I think any type of bathymetry data would be fine, even some current day data as it would be expected to take soundings as necessary during the mission to avoid grounding. This is standard operating procedure today, and it was clearly identified as a procedure successful Commanding Officers such as Fluckey used on the Barb during his Namkwan harbor raid. The track chart on page 270 of Thunder Below! clearly shows the 10 and 20 fathom curves. This was a critical success factor in the Namkwan harbor raid.

[GlobalExplorer]

I would find it useful too, I just don't have the figures and I don't know how to get them quickly. Besides, there are other sources for this type of data on the web, so feel free to send me a file with the exact color index, and I'll see to it to include it. No larger than 8192x4096 please.

Making a color index is even more difficult because I use transparency on the map, that distorts colors. It's not easy to produce an automatically generated map that is still readable, so my focus is on making the various information types distinguisheable, not as exact as possible.

And before this gets discussed all geospatial layers will use current day data, there is no such thing as WWII GIS files.

But thanks the point of this thread is to collect suggestions so I will put "exact color index" down under nice to have.

[GlobalExplorer]

I have a question. Atm I am working to incorporate moored ships in a useful way. My general aim is to present valuable intelligence information without giving the player a complete gods eye. Right now I cannot decide what is the best way to show docked ships.

Screenshot 1 shows a new polygon buffer method which reveals only an outline around the moorings, together the class of ships (merchnants, warships). So far this is my favorite, but it differs in many from the Sh3Gen approach.

Screenshot 2 shows as ships as markers with a label, like in Sh3Gen. This is very informative, problem is this a bit too revealing - which does not fit well with the intelligence theme. An advantage is that the user can review the unit in a property window like the one in the screenshot.

screenshot 3 shows both at the same time, thats also possible.

Which one do you think is better?



screen1: Saipan, outlines & ship class:






screen2: Saipan, labeled markers (also shows property window):






screen3 : Saipan, outline & labeled markers combined:

[GlobalExplorer]

Finally a comparison shot of the Saipan with a high resolution shoreline.

The problem is this is a large file (~157mb) and I am not sure if it's really worth it considering download size. Fortunately the TatukGIS viewer can display it without any noticeable performance hit, I must say this program keeps amazing me!





This is tiny Wake Island in high res. That will be the maximum resolution that I can provide.



For comparison, Wake in standard resolution:

[Observer]

Originally Posted by GlobalExplorer

I would find it useful too, I just don't have the figures and I don't know how to get them quickly. Besides, there are other sources for this type of data on the web, so feel free to send me a file with the exact color index, and I'll see to it to include it. No larger than 8192x4096 please.

Making a color index is even more difficult because I use transparency on the map, that distorts colors. It's not easy to produce an automatically generated map that is still readable, so my focus is on making the various information types distinguisheable, not as exact as possible.

And before this gets discussed all geospatial layers will use current day data, there is no such thing as WWII GIS files.

But thanks the point of this thread is to collect suggestions so I will put "exact color index" down under nice to have.

I've played around with something called Virtual Ocean. It's pretty nifty and allows the user to create contour lines as well as define the color scheme for the depth.

Link: http://www.virtualocean.org/

I'm not sure if this helps, or even how to integrate the data. It has a function to save the data as jpg and several other formats. Maybe this is useful?

[GlobalExplorer]

I'd actually need something like this, but with information about the color index.

These images use grey values, so depth is probably a value between 0-255, which must still be multiplied with a constant factor.

[Observer]

Doesn't the BIN file referenced at the link you provided and quoted below provide the necessary color information (I've bolded the relevant part) when combined with the image?

There is a BIN file included, which is the raw format, and not an image. Reto Stockli has provided the following explanation of the format: .bin files in the BMNG file repository are made of 8bit unsigned binary files, structured as 3 Channels X 86400 columns X 43200 lines. No header data, no ASCII text data in these files. You read the files as a byte array with 3 dimensions: 3x86400x43200 where the first dimension are the RGB (Red Green Blue) color triplets of the image, the second dimension are the number of columns (X dimension) and the third dimension are the number of lines (Y dimension). The image starts with 3 bytes of the RGB values of the northernmost and westernmost pixel. The next 3 values are the RGB values of the one pixel to the east of the first pixel. And so on. Geographic projection with a regular grid spacing of 0.004166667 degrees per pixel.

[GlobalExplorer]

No, the BIN file is the same image in raw format:

Open it in Photoshop but you need A LOT of memory and Version 8 or higher (e.g. I myself cannot do that): Open as -> RAW -> width 86400, height 43200 pixels, count 3, depth 8 Bits, interleaved, Header 0 Bytes.

These are greyscale images, so R=G=B.
8bit = values from 0-255. So there will be big jumps in depth.

What's still missing is the factor that the R/G/B value has to be multiplied with to get the exact depth. One could calculate it by locating a known point like Challenger Deep but I don't like that approach.

I know there are other datasets for height information, but I am too busy to look for them. The one provided is ideal in that it covers only oceans, many other concentrate on land.