Obstacles Switzerland

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Obstacles Switzerland

Author	Message
Chris_LSZO	Chris_LSZO posted 8/22/2018 4:27:39 AM HOT Topic Details Share Topic
Group: Forum Members Posts: 107, Visits: 149	Hi In Switzerland we have a lot of cables and other dangerous stuff. Unfortunately Skydemon don't show some of them. Here are the official source, in this example 2 cables are visible and they are missing in Skydemon. Here you can download the *.kmz-file of all obstacles. Could you fix this please? Thank you. Chris
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Tim Dawson	Tim Dawson posted 8/22/2018 10:57:45 AM Post Details Share Post
Group: Forum Members Posts: 8K, Visits: 9.1K	It is standard in enroute aeronautical charts to include obstructions whose height is at least 300ft AGL only. In Switzerland we do vary this and include obstructions whose height is at least 200ft AGL. It is therefore probably the case that the "missing" obstructions you alluded to are too small to be selected for inclusion in our charts.
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Chris_LSZO	Chris_LSZO posted 8/22/2018 11:12:30 AM Post Details Share Post
Group: Forum Members Posts: 107, Visits: 149	+x Tim Dawson - 8/22/2018 10:57:45 AM It is standard in enroute aeronautical charts to include obstructions whose height is at least 300ft AGL only. In Switzerland we do vary this and include obstructions whose height is at least 200ft AGL. It is therefore probably the case that the "missing" obstructions you alluded to are too small to be selected for inclusion in our charts. Thats maybe the reason, yes. Does that mean the height of the masts or the maximum height of the cable above the ground? Last week I almost flew into one of the two cables, which was really close! I'm pretty sure the rope was higher than 200ft above the ground. Chris Edited 8/22/2018 11:13:45 AM by Chris_LSZO
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Tim Dawson	Tim Dawson posted 8/22/2018 11:24:07 AM Post Details Share Post
Group: Forum Members Posts: 8K, Visits: 9.1K	We are given a "maximum height above ground level" datapoint, where the word "maximum" implies that includes the cable, in the event it crosses a valley. It's that value which we require to be at least 200ft.
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Chris_LSZO	Chris_LSZO posted 8/22/2018 11:29:58 AM Post Details Share Post
Group: Forum Members Posts: 107, Visits: 149	+x Tim Dawson - 8/22/2018 11:24:07 AM We are given a "maximum height above ground level" datapoint, where the word "maximum" implies that includes the cable, in the event it crosses a valley. It's that value which we require to be at least 200ft. Okay Tim. Could you reduce the limit to 100ft maybe? Or could you implement an option the user can choose this limit byself? Many helicopter pilots use this software... Chris Edited 8/22/2018 11:38:36 AM by Chris_LSZO
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Tim Dawson	Tim Dawson posted 8/22/2018 4:18:36 PM Post Details Share Post
Group: Forum Members Posts: 8K, Visits: 9.1K	We would only do this if faced with significant demand to do so. The reason why obstacles over 300ft (typical value) are excluded from enroute charts is to reduce clutter, because there are a lot of them. Is it normal to fly a helicopter less than 500ft AGL when not taking off or landing where you operate?
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Chris_LSZO	Chris_LSZO posted 8/22/2018 9:11:23 PM Post Details Share Post
Group: Forum Members Posts: 107, Visits: 149	+x Tim Dawson - 8/22/2018 4:18:36 PM We would only do this if faced with significant demand to do so. The reason why obstacles over 300ft (typical value) are excluded from enroute charts is to reduce clutter, because there are a lot of them. Is it normal to fly a helicopter less than 500ft AGL when not taking off or landing where you operate? I'm agree with you. The best way would be if you leave the choice to the user: Let him adjust the min. height from 0 to 300ft. Or just a "Helicopter-switch". Chris
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Tim Dawson	Tim Dawson posted 8/28/2018 1:35:40 PM Post Details Share Post
Group: Forum Members Posts: 8K, Visits: 9.1K	But then we'd still be loading all those obstacles into memory (for the many obstacle related calculations we do) just electing not to display them. There isn't an option to selectively load only a subset into memory, based upon this theoretical helicopter switch. And we'd be introducing yet another option, which we dislike and confuses people.
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Chris_LSZO	Chris_LSZO posted 8/31/2018 12:54:54 PM Post Details Share Post
Group: Forum Members Posts: 107, Visits: 149	+x Tim Dawson - 8/28/2018 1:35:40 PM But then we'd still be loading all those obstacles into memory (for the many obstacle related calculations we do) just electing not to display them. There isn't an option to selectively load only a subset into memory, based upon this theoretical helicopter switch. And we'd be introducing yet another option, which we dislike and confuses people. (
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Gerhard66	G Gerhard66 posted 9/1/2018 2:16:32 AM Post Details Share Post
G Group: Forum Members Posts: 168, Visits: 355	Hi Tim, this switch already exists in the aircraft setup menu (airframe type)! I guess, the additional memory needed for a larger obstacle database wouldn't be a serious problem on modern handheld devices.... Gerhard
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