Zoom and Scaling issues - OS and Waypaths


Forum » General Forums » Mapping

By pwb999 on 18/10/18 at 6:44pm

Hi,

I am wondering why there are different levels of zooming dependent on whether OS or Waypaths option is selected. The OS option goes up to 11 but Waypaths to 9 zoom level

I generally like to print off the Waypath layer at 9 which seems to be 8cm grids or 1:12500 scale. I then annotate the grid lines with their respective OS grid numbers manually to ensure I dont get any measurements wrong.

Equally it would be nice to have a individual zoom option for OS 1:25 and another for 1:50 scale maps. I like the ability to print off at bigger sizes to make it easier to read. I know the level of detail is exactly the same regardless of the print scale - its just easier to read the fine detail.

Any ideas? Peter B.


By TallPaul on 18/10/18 at 6:59pm

We could, in theory, add zoom levels 10 and 11 to WayMaps however there's an issue with disk space and the time it takes to generate the tiles. Every time you increase a zoom level by 1 the number of tiles goes up by a factor of four so takes four times as long to generate and upload. So zoom 11 would take 16 times as long as zoom 9. As it is it takes hours to generate the raw tiles and the best part of a day to slice them up and upload them. So a wet finger calculation would suggest it would probably take a week or more to generate and upload a new tile set.

As for printing 1:25K and 1:50K OS tiles bigger can't you get your browser to scale up or down? If I'm printing 1:25K I normally shrink the tiles so I can fit more on a page of A4.


By pwb999 on 19/10/18 at 7:00pm

Many thanks for the response.

The suggestion to alter the Zoom levels via the Browser is a great idea. Solves a few issues !!

Using Chrome I have managed to print out my purchased Wansfell Pike Troutbeck, and Skelghyll gpx route onto a single A4 in landscape by zooming into level 9 but with my Chrome browser set at 50%.

The Grid squares printed off are not measuring 7cm by 7cm so its not a bad size to maximise the A4 printed sheet. So according to https://www.maptools.com/scale_calculator site this makes the scale is 1:14286. Or 1 cm on the map is now 140 metres on the ground.

I also found I could reduce the size of the Your Route Dialog to just show the Route name and the first 5 lines of information and placed it in the middle of the map where it would not interfere with the map detail as much. Is there a way to turn this Dialog box on and off, by chance ?

Is there any option to turn on the GRID line detail ie the Easting and Northing which would be visible on the final A4 printout. I always add these in manually anyhow.

Also I realise that OS licensing restricts you to just A4 printing but does this restriction also apply to the Waymaps which I thought was based on Open Street Map data. This layer looks the same as used by Viewranger ie Thunderforest sourced. Is this the case?

Many thanks for your help. Peter B.


By TallPaul on 19/10/18 at 9:02pm

I also found I could reduce the size of the Your Route Dialog to just show the Route name and the first 5 lines of information and placed it in the middle of the map where it would not interfere with the map detail as much. Is there a way to turn this Dialog box on and off, by chance ?

There's not and, to be honest, I don't think we're likely to add a means of doing so. The software is not designed for printing and indeed strictly speaking if you're using the Bing tile server (which you are for OS 1:25K) then according to their terms and conditions we may not "permit your end users to: [...] Use Prints of type "Ordnance Survey Map".

I see no practical way of actually preventing this, but we can't be seen to doing anything to actively encourage printing.

Is there any option to turn on the GRID line detail ie the Easting and Northing which would be visible on the final A4 printout. I always add these in manually anyhow.

The same comments apply here too.

Also I realise that OS licensing restricts you to just A4 printing but does this restriction also apply to the Waymaps which I thought was based on Open Street Map data. This layer looks the same as used by Viewranger ie Thunderforest sourced. Is this the case?

As I've said the licensing through Bing actually doesn't allow any printing (I thing the OS OpenSpace licensing does allow limited printing but I can't lay my hands on the wording now). As for Waymaps that uses data from a variety of sources and copyright of the rendering of the tiles rests with us. So you need our permission for re-use in any form and we do licence it occasionally for use in print media and it's also used on other web sites (although not by ViewRanger). As for printing from your web browser from our GPX mapping application then for personal use we've no great problem with you doing that ...



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