KMZ export

[dg0yt]

puzzlepaint reported on Sourceforge [tickets:#138]:

Add kmz export capability, optionally only for selected objects. For georeferenced maps only.
The internal process would be to export the map as raster image and cut it into tiles.

This can be used for example to display the map in Google Earth as overlay or use it as custom map on some Garmin devices.

[harzol]

This can be very useful for me.

Today I'm using OCAD to convert omap file to kmz.
First I have to save as OCAD file, than I can export KMZ file from OCAD.

But now I'm faceing an issue when I save ocad file in oomapper. - "Coordinates are adjusted to fit into the OCAD 8 drawing area"

How is it possible to turn off this coordinate adjustion?

[dg0yt]

Today I'm using OCAD to convert omap file to kmz.
First I have to save as OCAD file, than I can export KMZ file from OCAD.

Thanks to GDAL, we do have KMZ export via File > Export as... > Geospatial vector data. However, it is probably not what you will expect after using the other software, or from the first post here.

(I recently read how MapRun wants maps to be exported to KMZ: raster tiles indeed, not vector data.)

But now I'm faceing an issue when I save ocad file in oomapper. - "Coordinates are adjusted to fit into the OCAD 8 drawing area"

How is it possible to turn off this coordinate adjustion?

Don't use OCD 8. If you think there is a bug in loading or saving your file, please open a separate issue.

[SimonStarkey]

This would be a useful feature with our increasing use of MapRun through lockdown. Currently exporting map as an image then re-referencing the map in the MapRun utility

[dg0yt]

This would be a useful feature with our increasing use of MapRun through lockdown.

Sure. Implementing export should be more feasible once I can load the result into Mapper again. So I'm working on KMZ reading at the moment, in order to verify the expected results.
#1793
OpenOrienteering/superbuild#85

Currently exporting map as an image then re-referencing the map in the MapRun utility.

There is also a webservice which accepts JPG+world file to create KMZ, but you must temporarily change the georefencing of the map before JPG export:
http://maprunners.weebly.com/maps---kmz-files.html
http://www.p.fne.com.au/rg/cgi-bin/o-utils.cgi

[SimonStarkey]

Thanks for the info. Simon

…

On Sat, 12 Dec 2020, 20:23 Kai Pastor, ***@***.***> wrote: This would be a useful feature with our increasing use of MapRun through lockdown. Sure. Implementing export should be more feasible once I can load the result into Mapper again. So I'm working on KMZ reading at the moment, in order to verify the expected results. #1793 <#1793> OpenOrienteering/superbuild#85 <OpenOrienteering/superbuild#85> Currently exporting map as an image then re-referencing the map in the MapRun utility. There is also a webservice which accepts JPG+world file to create KMZ, but you must temporarily change the georefencing of the map before JPG export: http://maprunners.weebly.com/maps---kmz-files.html http://www.p.fne.com.au/rg/cgi-bin/o-utils.cgi — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#138 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AIWT52PUZ2KNFBRF5AACDJDSUPGNPANCNFSM4B3MF7DA> .

[dg0yt]

Implementation notes

• The tile size is fixed at 512x512 pixels.
• The image format is fixed as JPG, quality 75/100.

KMZ requirements for MapRunF (http://maprunners.weebly.com/maps---kmz-files.html):

• 512x512 tiles.
• 150dpi: User choice.
• KMZ size max 1 MB: Not checked, but indirectly controlled by user via resolution and map area.
• Raster files named files/tile_x_y.jpg (c9856ca)

KMZ requirements for Garmin (https://support.garmin.com/en-IE/?faq=FtEncUXbaE0xE04yZ7gTq5):

• KML file named doc.kml.
• Image format is JPEG.
  • without progressive image: default setting of Qt's JPEG writer.
• Image size not over 1 megapixel.
• Image size less than 3 MB: Not checked, but reasonable assumtion for tile size and quality parameter.

[dg0yt]

• 150dpi: User choice.

Not yet entirely true for Windows: #1815

[dg0yt]

Oh, MapRunF is much more restricted than expected:

Error: Error in the file content - Error in the KMZ file format - (Exception: Tiles in the KMZ file need to be named as a grid of files/tile_x_y.jpg - Instead found: files/0.jpg)