unity Get real geographic map 3D Chemical notes

Mind mapping notes

Software 、 Website preparation ：

1、SAS.Splant：SAS Sky map link .txt- Internet document resources -CSDN download ( Intranet available )

                            Sas planet free download（ The Internet is available ）

                            Universal electronic map downloader cracked version _ Universal electronic map downloader cracked version download [ Download tool ]- Download home ( Omnipotent electronic map downloader )

                           PS: Here we use SAS Complete project promotion .

2、GlobalMaper：Global Mapper( Map drawing tool )V22.0.2 Free unlimited software download - Green pioneer Download - Green software download station --

3、WorldMachine：World Machine Download the latest Chinese version -World Machine Terrain home Chinese official website

4、 Geospatial data cloud ： Geospatial data cloud

One 、SAS Get satellite images from ：

• 1、(SAS) Get satellite images from the software ：

Select satellite map mode , Day map available , I used it here MapQuest.（ This will have a gray route network ）.

• 2、(SAS) Select the terrain range in the box ：

After the box selection is completed, a window will pop up , Here we are   download   in , choice 21 Subdivision scaling for , And click download , Start downloading the segmented subdivision map .

Click the start button , Start the download .（ If you run the process , It is recommended to set a smaller subdivision , such as 18-20）.

When the download is complete , The blue progress bar in the window will be full , And it will show in the window , Task to complete .

Now , Need to click ③ Number mark , Box Icon , Bring out the following window , Splice satellite images .

• 3、(SAS) Full picture of middle splicing ：

After the window is activated , choice Splicing The following box selection parameters under Options .

Zoom here ： It needs to be consistent with the scaling in the second step , Here it is 21 Zoom in .

The quality is set to 100%, References .w.

After setting , Click Start , Start splicing satellite images .

• 4、(SAS) Derived from ECW file ：

ECW File export complete .

Two 、GlobalMaper Cutting satellite image ：

• 1、 stay GM Cutting in software , Export image ：

open GlobalMaper After software , take ECW Drag and drop files into the software .

• 2、 Output raster image settings ：

choice PNG After the image is exported , You can also choose   Output boundary , Cut the output part , I need the whole mountain here , So there is no cutting operation , The corresponding output image size will also increase .

after , Start exporting .

• 3、 export PNG and TXT Coordinate information ：

Continue exporting here , But you need to choose JPG, Our aim is to derive TXT Text with coordinate information .

It's just a matter of choosing TXT（ Text ） Metadata .

Frame selected longitude and latitude information , That's the important information we need to get , This directly affects , Matching effect between elevation map and satellite map .

Little knowledge points ：

Here's a little bit of knowledge , If the longitude and latitude information you export is different from the longitude and latitude data format shown in the above figure , Here, please , Format the output latitude and longitude .

3、 ... and 、 Get elevation map ：

• 1、 stay ( Geospatial data cloud ) Download DEM Altitude map ：

link ： Geospatial data cloud

After opening the website , First   choice Data sets , Fill in Latitude and longitude information .

• 2、 Input TXT Confirmation range of mid latitude and longitude ：

After filling in the data set and entering the latitude and longitude , Click to search , There will be downloadable data sets , Then click the download icon , Download the elevation map dataset .

• 3、 Download elevation map ：

Download complete , After decompression, you will get the following three files .

Four 、 Before going into GlobalMaper export HF2/HFZ：

• 1、 Once again into the GM, Enter latitude and longitude to cut ：

take Dem File drag GM In software

• 2、 export HF2/HFZ File format , And enter the latitude and longitude ：

Choose output ： Output elevation grid format .

Output Settings , Fill in latitude and longitude , Set specific area .

• 3、 Import... Again GM- measurement , Record Long , wide data ：

export HFZ After the document , Through again GM After opening the precise latitude and longitude HFZ file .

Select the ruler tool , Measure long data , And record it in the text .

Focus on the lower left corner Len Parameters , And record .

Record length here , wide , Is for later import into WM Preparations made in .

4、 export TIFF Format , stay WorldMachine Open in .

 

5、 ... and 、World Machine Middle note effect ：

• 0、WM Project settings , Unit is KM, Set the terrain color .

1、 Project setting unit .

2、 Set the terrain color .

• 1、(HFZ) Import WM, Set length , wide ：

1、 Create nodes , And double click to open the node settings

Import the... Output above TIF Images .

 

 

Uncheck the Preserve Aspect Ratio( Automatic aspect ratio ).

When unchecked , Can fill the whole selection .

2、 Long , wide , According to the parameters recorded in the text , Fill in .

       ①、 Set the length and width

       ②、 Synchronization settings

       ③、 Natural altitude ( True altitude )

• 2、 Import (PNG) Satellite pictures , And set the length , wide ：

1、 Same use File Input Node set , And import satellite images .

In addition to checking Interpret as RGB （ Enable color ） Button outside , The rest are consistent .

PS： Little knowledge points ： Here, if the imported image is black , Probably because there is no image mode enabled RGB Color .

At this time, you can import the image into PS, And modify the mode , And the output .

2、 Modified to complete , Click on （Refresh From File） Refresh from file .

• 3、(WM) Formal processing in ：

  • Create highway ：

    1、 establish Shapes node , Create and draw the highway .

After creation , Adjust the parameters , Set the segment width , And altitude .

2、 Right click >> Curve smoothness and (Perform Curve Smoothing), The highway stretches along the mountain (Drop Curve ToSurface of Selected Device).

        After selecting the second command , You can get the following effect .

• • Draw the river ：

1、 establish Shapes node , Create and draw rivers .

     

 2、 Flight fragmentation command , Check ( Use Breakup) Button , Double click the segment ,

3、 River depression treatment , Use Combiner Combine the equipment nodes to perform the test . Select the settings for the device Subtracting the , Subtract that will do .

• • Erosion refines the terrain ：

      1、 Use the... Under the erosion equipment node Mask .

            Mask only selected areas , Erosion effect of normal treatment in other areas .

    

    2、 Here use Combiner Device node , Add the mask parts .

3、 add to Inverter Reverse the device node （ Choose white or black ）.

4、 Add the reversed equipment to the... Under the bedroom equipment Mask In the opening .

• • Add terrain material ：

       1、 utilize macro Create materials , establish macro Device node .

 

 

2、 macro , And terrain equipment , and Erosion equipment     link .

     

  At this time, open the flat display window , You can see the effect of the mapped material .

3、 Show preview 3D Effect , utilize Overlay View Preview the device node . The preview node needs to enter , Height domain and Mapping .

• • Use satellite mapping , And add flow graph trace effect ：

1、 Under the erosion node , find Flow Map outlet , Connect to the display to get the flow chart effect .

2、 It can be used here Color The device changes the color of the flow chart , And utilization Layout Generator Customize the dash area device mask display .

• • Use mask , River course 、 Add materials to the road ：

1、 add to Choooser The equipment adds color to the road .

2、 After creation , Three data types need to be entered into the node ,A Input satellite images ,B Enter other asphalt images ,C Add height field , That is, highway or river height area .

• • Export height map and required map ：

1、 Altitude map export ：Hight Output The detail setting window appears in the node , On the path , Format , After setting , stand-alone "Write to Disk" Generate height map .

2、Splatmap Figure Export ： In the terrain export texture phase , Create a Basic Splatmap node （RGBA Channel setting node ）, And cooperate with BipMap Out Node for output .

3、Mask Figure Export ： It's exported here SplatMap and Mask Map similarity , So here is a combination of my last article

World Machine Terrain production import Unity Workflow notes

In the process , Add transparent channels to all images referenced ( Basically, the left and right maps of the terrain need to have channels ) To control , Include Color Map bar ( Matching terrain shader Use ).

ok, That's all for this article , How to use real terrain data .