Re: [talk-au] Well I bought an L1/L5 Mouse GPS

[Alex Sims via Talk-au]

The device is quite amazing. Will use 30-40 satellites from a mix of GPS, 
GLONASS, BEIDOU, QZSS (only on Windows, not on Android) and GALILEO. Is getting 
signals from both L1 (1575MHz) and L5 (1176MHz) bands from most GALILEO and 
half of BEIDOU and GPS, so removes most of the ionosphere noise. And then the 
kicker is, if I capture the raw measurements I can then run it against 
corrections from Geoscience Australia and get 10-30cm accuracy, so they say.

In a session this afternoon I walk around objects of interest and form a star 
on survey marks. I also walked around a sporting pitch circle to apply the 
circle test, that is travel in a circle and then the largest inner and smallest 
outer circle that encompasses all points indicates the accuracy. Looking about 
17.5m inner and 19m outer for a soccer centre circle. So I’m convinced.

From: Bob Cameron 
Date: Thursday, 23 June 2022 at 7:11 pm


One of the cross checks I do is to use a bidirectional Mapillary track layer. 
I'd suggest fairly good for road centering in open places (ie no phase delay 
GPS reflections). No good for non


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[talk-au] Australian Buildings in 3D - verandah

[Alex Sims via Talk-au]

Hi,

I can’t seem to workout how to do a veranda (lightweight external roof, not the 
main roof of a building) in Simple 3D mapping. Can someone please point to some 
existing examples on the map that work?

I’m looking for two particular variations of a two storey building. The first 
is a shop with a simple veranda, the second is a hotel with two stories of 
verandah, the second storey being available to walk on

Example simple veranda:
https://commons.wikimedia.org/wiki/File:Commercial_road_prahran_in_2006.jpg
Shops in Commercial Road, Prahan
https://commons.wikimedia.org/wiki/File:Harlaxton_House.jpg
Harlaxton House, Towoomba

Example two storey:
https://commons.wikimedia.org/wiki/File:Sir_William_Wallace_Hotel_Balmain_1.jpg 
Sir William Wallace Hotel, Balmain

Alex


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