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ubarsc / tuiview

TuiView is a lightweight raster GIS with powerful raster attribute table manipulation abilities
http://tuiview.org/
GNU General Public License v2.0
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Allow Surrogate Table Lookup from floating point columns #21

Closed gillins closed 2 years ago

gillins commented 2 years ago

Currently, only integer columns have the "Set column as Color Table Lookup" menu option. As @petescarth discovered this is a bit of a pain if you get pyshepseg to calculate a mean value for a segment as it saves this in a float column (although note that median values get saved in an int column). You have to create a new column with the integer version of the mean value.

I don't think there is any harm in allowing a Colour Table lookup on float columns by doing a round() first? Any thoughts @shepjd?

shepjd commented 2 years ago

Hi Sam

Go for it, makes perfect sense to me.

Cheers James

From: Sam Gillingham @.> Sent: Sunday, September 19, 2021 3:55 PM To: ubarsc/tuiview @.> Cc: James Shepherd @.>; Mention @.> Subject: [ubarsc/tuiview] Allow Surrogate Table Lookup from floating point columns (#21)

Currently, only integer columns have the "Set column as Color Table Lookup" menu option. As @petescarthhttps://aus01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fpetescarth&data=04%7C01%7Cshepherdj%40landcareresearch.co.nz%7C0aa07eb3dfe04d219bca08d97b215602%7C43050530b3c74cd2a11cb826b2604b5b%7C0%7C0%7C637676205382894500%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=24GhHDpvYYRpZiNDQdBaCpRuXKWhxsiQuXgochpiCEE%3D&reserved=0 discovered this is a bit of a pain if you get pyshepseg to calculate a mean value for a segment as it saves this in a float column (although note that median values get saved in an int column). You have to create a new column with the integer version of the mean value.

I don't think there is any harm in allowing a Colour Table lookup on float columns by doing a round() first? Any thoughts @shepjdhttps://aus01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fshepjd&data=04%7C01%7Cshepherdj%40landcareresearch.co.nz%7C0aa07eb3dfe04d219bca08d97b215602%7C43050530b3c74cd2a11cb826b2604b5b%7C0%7C0%7C637676205382899474%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=lpqJrWV5Bx8FaP5LuAdH0xjJ3jFbuNtgi2EsK4HtUCc%3D&reserved=0?

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