grid lines



07 Aug, 2019 04:28 AM

My map is configures for UTM coordinates, both primary and secondary. However I see two grids on the map, one blue, the other gray. The blue one is labeled with UTM coordinates. The gray one is slightly offset from the blue one but otherwise identical. What is the purpose of the gray grid and how do I get rid of it? Screen shot attached.

  1. Support Staff 1 Posted by rmarcucci on 07 Aug, 2019 04:24 PM

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    The gray grid is a UTM grid as well. Long story short, there are multiple ways to model the shape of the earth and each results in a slightly different UTM grid, hence the offset you are seeing between the two. The USGS maps are using an older and less accurate model of the earth (NAD27) as opposed to the modern standard CalTopo uses (WGS84)

    There is no way to get rid of the gray grid other than changing your baselayer as they are part of the source data.

    Thank you for using CalTopo,

  2. rmarcucci closed this discussion on 07 Aug, 2019 04:24 PM.

  3. Steve Marcy re-opened this discussion on 07 Aug, 2019 09:39 PM

  4. 2 Posted by Steve Marcy on 07 Aug, 2019 09:39 PM

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  5. Ben Lantow closed this discussion on 08 Aug, 2019 01:54 AM.

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