Stake out with SW maps

Q&A forumCategory: QuestionsStake out with SW maps
Jan89 asked 3 weeks ago

Hi community,
i try to stake out some given points with SW Maps. The measured ones are easy, just choose them and you see delta x and delta y… How i can now load some own coordinates (e.g. from a shapefile or .kml) for doing so?
Many thanks for replying,
 
Jan

13vadimka13 replied 2 weeks ago

I don’t know, how to import own points in SW Maps. This feature is most likely not available in the app. But I recommend that you use app Landstar 7 https://play.google.com/store/apps/details?id=com.huace.landstar7&hl=ru&gl=US with NMEA with settings: CHC, Other, NMEA0183. In this app you can import own coordinates. Moreover, you can do coordinates transformation, site calibration and use local coordinates

5 Answers
13vadimka13 answered 2 weeks ago

You can write to developer: support@softwel.com.np

Fabio P answered 2 weeks ago

Hello, in SW Maps you can upload your files (shape, kml, etc.)  in the related directory under “Maps“.
You can find this folder under SW_Maps directly on your Android device or in
Android\data\np.com.softwel.swmaps\files\Maps
Every file type have is own subdirectory.
You can connect your Android’s device to a PC and load the file.
Due the fact that “Android\data” folder are a system folder, from inside the device, you must use  use a file manager like CX File Explorer (Cx File Explorer – App su Google Play)
You can have a look also to the SW Maps Manual (http://softwel.com.np/images/download_manual/SW%20MAPS5.pdf)
Hope this can help you
F.

13vadimka13 replied 2 weeks ago

Fabio, thank you
Your explanation gave me good apportunity to download kml and other. But I still can’t stake out a point with centimeter accuracy. In SW Maps, there is a transition to Google maps, but it uses GPS or mocklocation, without specifying how many centimeters are left. All this is available in Landatsr 7. This is not an advertisement, just an app really convenient for stake out. I need the app to show how many centimeters to the point, how much to the north, to the east. Or I don’t understand something?

Fabio P replied 2 weeks ago

Hello, i’ve not yet tested Landstar 7, from a first overview looks to have interesting feature, more than SW Maps. Anyhow i find SM Maps more easy and userfriendly, at least for basic activity like take over points using cm accurancy.
Sorry for my poor english, but what you mean with “stake out a point” ?
In SW Maps, if you click on a point you have on an’imported layer, you should be able to see:
– the distance from actual location:
– Bearing
– dx / dy
The centimeter accurancy is available only if you have a Ardusimple Rover connected, and NTRIP connection.

13vadimka13 replied 2 weeks ago

Fabio P, hi
Thank you for advice. I solve my problem by updating app and use shapefiles Instead of kml.

“Stake out a point” means seeking point on earth’s surface by its coordinates. It is opposite process to land survey. This words from geomatics.

There is a drawback of Landstar vs SW Maps. Landstar 7 uses max 12 sattelites for survey and stake out. At least he writes so, fix in the pine forest catches with a bang 35 km from the base. As I understood this limitation is NMEA 0183. I tried to install the latest 4.11 version of NMEA, it did not help. On the other hand, it doesn’t make sense, because it works so well. Plus, there is a change in the elevation mask and the use of any datum. In SW Maps, the application writes that it uses all possible satellites, which is good news. For a stake out in heavy conditions, this will be a plus

Jan89 answered 2 weeks ago

Hi,
@13vadimka13: Thanks for the replying – I will recently look also at this app.
@Fabio P: I already know the feature for ‘stake out’ a point form a measured layer in SW Maps by clicking on it and bring the dx/dy near to zero (of course with ntrip-correction and Ardusimple-rover). My problem is now with own imported layers e.g. from a .kml or shapefile – there i can not choose the point in the described way.
Maybe i do something wrong or has nobody used SW Maps for staking out with cm-accuracy?
Best regards
Jan

13vadimka13 replied 2 weeks ago

Hi, Jan89
For staking out in SW Maps (2.8.0.2, on my 2.7.2 it doesn’t work at all) you will import Shape file with points. You should import points in WGS84 or other coordinate system in txt or csv format in Landstar 7 app and use “export+” feature with “WGS84 whithout projection” settings. After that, you must relocate all files (because they include projection files and other important) from folder with shape file (you choose in Land star 7) in common drive/SW_Maps/Maps/shapefiles (for Xiaomi Redmi Note 5 MIUI Android 9). Import shp to SW, create layer and tap on point, stake out parameters appear.

There is also oneway to create shape file. You will import kml file (you can write in windows note in format:

# B L
1 12.34567890 12.34567890
etc.)

Import in Global mapper https://www.bluemarblegeo.com/global-mapper/ . Export such as vector data in shape (in settings you’ll choose points)

Write me, if you face with problems

13vadimka13 answered 2 weeks ago

Stake out feature appeared in 2.7.3 version of app. From 2.7.4 appeared UBX logging bug. Files don’t record or record only after first start of the app

Jan89 answered 2 weeks ago

Hello to all,
after a few attempts, the staking out of own points in SW Maps works. For all those interested, here is my procedure:
– Coordinates with attributes should be in decimal degrees in the system WGS84 as ASCII-csv-file,
– with GPSBabel (or other programs) these can be converted into ESRI-shapefiles,
– insert these files into the Android file directory of SW Maps,
– this can be read in as a new layer, with activated RTK-GNSS the points can now be selected and staked out with cm-accuracy.
@13vadimka13: I currently use USB-OTG to log the .ubx data, I haven’t seen the bug there yet. Also many thanks for the tip with the shapefiles instead of .kml – now i can use SW Maps for the most of my applications.
Best regards
Jan