<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Jason,<div class=""><br class=""></div><div class="">Try taking a look at this function from the testsuite:</div><div class=""><a href="https://github.com/OSGeo/PROJ/blob/f278b5bee641dd94245ed54f4eb75e29c3d4d993/test/unit/test_c_api.cpp#L166-L203" class="">https://github.com/OSGeo/PROJ/blob/f278b5bee641dd94245ed54f4eb75e29c3d4d993/test/unit/test_c_api.cpp#L166-L203</a></div><div class=""><br class=""></div><div class="">I think it might help you along.</div><div class=""><br class=""></div><div class="">/Kristian<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 9 Mar 2021, at 23:51, Jason Dick <<a href="mailto:JasonD@TheTranstecGroup.com" class="">JasonD@TheTranstecGroup.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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<div text="#000000" bgcolor="#FFFFFF" class=""><p class="">Still trying to figure this out. This is using PROJ6, btw. Based
on another thread, there are two ways of specifying EPSG 4326:</p><p class="">+proj=longlat +datum=WGS84</p><p class="">and <br class="">
</p><p class="">+proj=longlat +datum=WGS84 +type=crs</p><p class="">The former is PJ_TYPE_OTHER_COORDINATE_OPERATION and the latter
is PJ_TYPE_GEOGRAPHIC_2D_CRS. I don't understand the difference.
How can the first be an operation? What's it doing? And why does a
CRS not work with proj_lp_dist?<br class="">
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