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Offset error With Crete Hiking Maps

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Offset error With Crete Hiking Maps Empty Offset error With Crete Hiking Maps

Post  fergi985 on Tue Feb 08, 2011 10:09 pm

Hello

I have just started using OruxMaps for Android - the online mapping and offline caching is fantastic.

I have a problem when trying to use scanned GPS compatible maps of Crete (Google Earth not too good for reading the terrain). No matter what I try with Orux Desktop my input data points are offset by about 500 meters (North and East on a 5km by 7km map) when loaded onto the phone, this is also confirmed by loading a track from "Wikiloc" it is displaced relative to the footpaths shown on the map.

I am using x, y data from reading the cursor position in the image in "Photoshop", is this correct? I note the otrk file gives "MapDimensions height="3501" width="2550"" for layerlevel 16' ; but "photoshop" sees the image as 2963 by 2159 pixels.

I could email the image and otrk file if anyone would be willing to offer some advice on this.

Many thanks
John



Last edited by fergi985 on Tue Feb 08, 2011 11:21 pm; edited 1 time in total (Reason for editing : I think I have a clue to where the problem might be)

fergi985

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Offset error With Crete Hiking Maps Empty Re: Offset error With Crete Hiking Maps

Post  orux on Wed Feb 09, 2011 7:03 am

fergi985 wrote:Hello

I have just started using OruxMaps for Android - the online mapping and offline caching is fantastic.

I have a problem when trying to use scanned GPS compatible maps of Crete (Google Earth not too good for reading the terrain). No matter what I try with Orux Desktop my input data points are offset by about 500 meters (North and East on a 5km by 7km map) when loaded onto the phone, this is also confirmed by loading a track from "Wikiloc" it is displaced relative to the footpaths shown on the map.

I am using x, y data from reading the cursor position in the image in "Photoshop", is this correct? I note the otrk file gives "MapDimensions height="3501" width="2550"" for layerlevel 16' ; but "photoshop" sees the image as 2963 by 2159 pixels.

I could email the image and otrk file if anyone would be willing to offer some advice on this.

Many thanks
John


Hi, John;

here-->oruxuro@gmail.com

orux

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