IGN 1/500000 map for France

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IGN 1/500000 map for France

Author	Message
Gerhard66	G Gerhard66 posted 1/17/2022 9:17:40 AM Post Details Share Post
G Group: Forum Members Posts: 168, Visits: 355	+x Tim Dawson - 1/17/2022 9:12:16 AM If this IGN chart colour codes the towns, how can that take into account the aircraft type? As I understood, the town type is independent of aircraft type. Only the altitude is depending on town type and aircraft type.
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Tim Dawson	Tim Dawson posted 1/17/2022 9:12:16 AM Post Details Share Post
Group: Forum Members Posts: 8K, Visits: 9K	If this IGN chart colour codes the towns, how can that take into account the aircraft type?
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BJS	B BJS posted 1/15/2022 10:40:46 AM Post Details Share Post
B Group: Forum Members Posts: 47, Visits: 149	+x grahamb - 1/14/2022 8:58:04 PM It’s not quite as simple as that, as the overflight minimum for the some installations and towns varies according to aircraft type. Which to my knowledge is correct, but given the way Skydemon is built today, may mean a huge change effort for the software as it would make the chart depiction dependent on the aircraft profile chosen. I somehow doubt that is easily done.
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grahamb	grahamb posted 1/14/2022 8:58:04 PM Post Details Share Post
Group: Forum Members Posts: 566, Visits: 27K	+x Gerhard66 - 1/14/2022 5:46:47 PM +x Tim Dawson - 1/14/2022 10:11:04 AM I wonder how many towns there are that are categorised that way. We could certainly schedule a work item to make a list, but then we'd need to work out how to display them differently. France is rather unusual in colouring certain towns a certain way. You could display the vertical limits in virtual radar without confusing color codes. It’s not quite as simple as that, as the overflight minimum for the some installations and towns varies according to aircraft type.
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Gerhard66	G Gerhard66 posted 1/14/2022 5:46:47 PM Post Details Share Post
G Group: Forum Members Posts: 168, Visits: 355	+x Tim Dawson - 1/14/2022 10:11:04 AM I wonder how many towns there are that are categorised that way. We could certainly schedule a work item to make a list, but then we'd need to work out how to display them differently. France is rather unusual in colouring certain towns a certain way. You could display the vertical limits in virtual radar without confusing color codes.
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BJS	B BJS posted 1/14/2022 4:01:22 PM Post Details Share Post
B Group: Forum Members Posts: 47, Visits: 149	+x Tim Dawson - 1/14/2022 10:11:04 AM I wonder how many towns there are that are categorised that way. We could certainly schedule a work item to make a list, but then we'd need to work out how to display them differently. France is rather unusual in colouring certain towns a certain way. AFAIK all towns in France are categorised on the IGN charts: yellow circles = 1700ft, yellow other than circle = 3000ft and orange areas = 5000ft minimum.
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Tim Dawson	Tim Dawson posted 1/14/2022 10:11:04 AM Post Details Share Post
Group: Forum Members Posts: 8K, Visits: 9K	I wonder how many towns there are that are categorised that way. We could certainly schedule a work item to make a list, but then we'd need to work out how to display them differently. France is rather unusual in colouring certain towns a certain way.
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pgroell	pgroell posted 1/13/2022 10:33:03 AM Post Details Share Post
Group: Forum Members Posts: 95, Visits: 16K	+x Tim Dawson - 1/13/2022 9:48:01 AM Do they? Or do they just offer that IGN static chart as a map background? The data, for personal use can be downloaded here (after having created an account). https://geoservices.ign.fr/ressource/157762 I am afraid these are only images of the maps, so no vectors, no alerts, no decluttering...
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Tim Dawson	Tim Dawson posted 1/13/2022 9:48:01 AM Post Details Share Post
Group: Forum Members Posts: 8K, Visits: 9K	Do they? Or do they just offer that IGN static chart as a map background?
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BJS	B BJS posted 1/12/2022 11:36:25 AM Post Details Share Post
B Group: Forum Members Posts: 47, Visits: 149	+x Gerhard66 - 1/9/2022 7:42:35 PM +x Tim Dawson - 1/6/2022 10:29:26 AM It looks like it's done on "mean width" of the town, goodness knows how that is calculated and whether we would even arrive at the same exact results as the other chart. The way we decide on what town dots/blobs to display at what zoom levels is dynamic and depends on how built-up each area/country is. As C82R mentioned („You can freely access to the map through https://www.geoportail.gouv.fr...“), IGN seems to have no financial interest in providing the data. One could ask IGN if they would be so nice and make the underlying data available as XML-File or similar… As other competitors already offer that, the data must be available in electronic format already.
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