TECH­NOL­OGY

SA Bass - - Contents -

“How to…Cre­ate a Google Earth His­tory Chart For Your Lowrance HDS Units” This topic has been de­bated a lot and there are a few ways to do this – Rowan Tim­mer

This topic has been de­bated a lot and there are a few ways to do this. Most in­volve a painstak­ing and timely process to get right. This method will change your life if you have at­tempted these maps be­fore. Af­ter loads of trial and er­ror, trolling the net and pri­vate help from an in­ter­net friend in the USA, I per­fected this method a few years back and have been keep­ing it a se­cret un­til now. The time has come to share it and ul­ti­mately get guys onto mak­ing these maps quickly and eas­ily them­selves. I use this par­tic­u­lar method to make maps ex­clu­sively for my Lowrance Units.

There are a few things you need to in­stall and change on your PC’s be­fore this will work, but once they are done its re­ally sim­ple. Bear with me.

1 Step 1: Down­load SAS Planet. https://bit­bucket.org/ sas_team/sas.planet.bin/downloads/

2 Step 2: In the SAS planet folder you will need to add two tile stor­age files. The files you need are: https://bit­bucket.org/gre­verse/gre­verse.bit­bucket.org/ downloads/TileS­tor­age_GC_1.0.0.8.7z https://bit­bucket.org/gre­verse/gre­verse.bit­bucket.org/ downloads/TileS­tor­age_GE_1.0.0.9.7z

Once you have these, copy and paste them into the SAS planet folder that was cre­ated when you did the down­load.

3 Step 3: In the maps sub­folder in the main SAS planet folder copy and paste this file : https://bit­bucket.org/gre­verse/gre­verse.bit­bucket.org/ downloads/GeoCacherDirect.zmp

4 Step 4: Lo­cate your Google Earth cache folder. Nor­mally it is here: C:\Users\your­name\Ap­pData\ Lo­calLow\Google\GoogleEarth\

5 Step 5: Di­rect SAS planet to the Google Earth cache lo­ca­tion

Okay, that’s the hard part done and you only have to do this once on the ini­tial setup.

6 Step 6: Open Google Earth and se­lect the his­tor­i­cal date you wish to use. Now you need to make sure that the whole im­age has loaded, which ba­si­cally means zoom­ing in as much as you can so that the tiles are down­load­ing to your cache. Ba­si­cally as you view in Google Earth the tiles you view are be­ing saved au­to­mat­i­cally to the cache folder you found just now. You just need to scroll around the dam so they ac­ti­vate and down­load. This al­lows you to re­open Google Earth and view pre­vi­ously viewed places quickly with­out hav­ing to re down­load the tiles. Click your way along the dam un­til you can see it is fully down­loaded. When you are done, close Google Earth.

7 Step 7: Open SAS Planet and choose Earth (Google Earth) as the tar­get map.

8 Step 8: Find your dam lo­ca­tion on SAS Planet and then se­lect the ver­sion date that you used in Google Earth on the time line.

The his­tor­i­cal im­agery you viewed in Google Earth should now be dis­play­ing on SAS Planet.

9 Step 9: Out­line the area you want to build with the Polyg­o­nal tool and click the green tick.

10 Step 10: Se­lec­tion man­ager. Click on the stitch tap and choose KMZ for Garmin Over­lays

11 Step 11: Cre­ate a tar­get folder on your desk­top and save the build to that folder. The file ex­ten­sion is now .KMZ which al­lows you to open in Google Earth to check.

The pic­ture above shows the his­tor­i­cal im­age auto over­laid and ref­er­enced in Google Earth. No more stretch­ing and pulling to fit the im­age, it is done au­to­mat­i­cally. Once you are happy with the im­age (do a small test one oth­er­wise it will be too big for your PC to han­dle) delete the .KMZ file you built. The step above is purely for test pur­poses and once you have got the hang of this you don’t need to do it. You will now have to restart the im­age build step as be­fore but save the file with the file ex­ten­sion from .KMZ to .ZIP. This is im­por­tant. It must be a .ZIP ex­ten­sion. Click start.

12 Step 12: You will now have a zip-file in your tar­get folder. Down­load 7ZIP from the net and use that to ex­tract the files. Right click the zip folder and choose 7ZIP/ Ex­tract here. It will save a .KML file and a folder called “files”. Delete the zipped folder you don’t need it any­more.

13 Step 13: In­sight Map Creator. Down­load the free soft­ware from the In­sight store. You will have to reg­is­ter an ac­count and go through the steps of buy­ing on­line. There is no fee but you need to do it this way and they will email you the down­load link. Save the pro­gram and open it up.

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