Transverse Lambert cylindrical

[Bernhard Jenny]

When selecting a transverse aspect for the Lambert equal-area cylindrical, the following error is returned:
ProjectionFactoryError: This projection center is not allowed for this projection.
Is this a bug or is there another option for creating a transverse aspect?

Thank you,
Bernie Jenny

[daan]

Hi Bernie. The error message ought to be a little more informative; sorry about that. The reason transverse is not allowed there is that Geocart defines the Lambert cylindric to be the equatorial aspect specifically, in much the way that Briesemeister is centered on 45° specifically, for example. If you move the projection center elsewhere, then it is no longer Lambert, and Geocart would be obliged to change the name of the current projection. But Geocart does not feel comfortable changing a named projection for you automatically under the theory that if you requested Lambert, you wanted Lambert. The way to get what you want is to change the projection from Lambert cylindric to “equal-area” from the cylindric menu. That is the generic form of the projection. The equal-area cylindric will inherit the 0° standard parallel from the Lambert. Then you can change the aspect to anything you want.

Regards,
— daan

[Bernhard Jenny]

Thank you daan, this works for me.
Bernie