{"id":18,"date":"2015-04-15T12:03:41","date_gmt":"2015-04-15T19:03:41","guid":{"rendered":"https:\/\/rtimage.us\/?page_id=18"},"modified":"2015-04-15T21:54:17","modified_gmt":"2015-04-16T04:54:17","slug":"rti-files","status":"publish","type":"page","link":"https:\/\/rtimage.us\/?page_id=18","title":{"rendered":"RTI Files"},"content":{"rendered":"<p>Here are links to a few RTI\/PTM data files for lithics; you will need the free RTIViewer software to see them (freely available at the <a href=\"http:\/\/culturalheritageimaging.org\" target=\"_blank\">Cultural Heritage Imaging website<\/a>). You should right-click on the links and choose &#8220;Save As&#8221;, otherwise you will see bunch of weird text in your browser; in some browsers, Alt-click will also download the link directly. There are two kinds of RTI data files. *.ptm files are a fitting of a binomial quadratic equation to the light curve, while *.rti use a 2nd or 3rd order Legendre polynomial for the fit. *.rti files are a better fit, but there are more visualization modes available with *.ptm files. I have many more &#8211; <a href=\"mailto:leszek.pawlowicz@nau.edu\" target=\"_blank\">contact me<\/a> if there&#8217;s a point type you&#8217;d like to see (and that I have). Note: These files are up to about 70\u00a0MB in size; the modern obsidian point files are the largest (but are indicative of the kind of resolution you can get with this technique).<\/p>\n<p><a href=\"https:\/\/rtimage.us\/Lookout_Mtn_LRGB.ptm\" target=\"_blank\">Modern obsidian point (PTM)<\/a><br \/>\n<a href=\"https:\/\/rtimage.us\/Lookout_Mtn_order_2.rti\" target=\"_blank\">Modern obsidian point (RTI)<\/a><\/p>\n<p><a href=\"https:\/\/rtimage.us\/Chalcedony_LRGB.ptm\" target=\"_blank\">Chalcedony point (PTM)<\/a><br \/>\n<a href=\"https:\/\/rtimage.us\/Chalcedony_order_2.rti\" target=\"_blank\">Chalcedony point (RTI)<\/a><\/p>\n<p><a href=\"https:\/\/rtimage.us\/Molina_Clovis_LRGB.ptm\" target=\"_blank\">Molina Spring Clovis (PTM)<\/a><br \/>\n<a href=\"https:\/\/rtimage.us\/Molina_Clovis_order_2.rti\" target=\"_blank\">Molina Spring Clovis (RTI)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here are links to a few RTI\/PTM data files for lithics; you will need the free RTIViewer software to see them (freely available at the Cultural Heritage Imaging website). You should right-click on the links and choose &#8220;Save As&#8221;, otherwise &hellip; <a href=\"https:\/\/rtimage.us\/?page_id=18\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":3,"comment_status":"closed","ping_status":"open","template":"","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"class_list":["post-18","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/rtimage.us\/index.php?rest_route=\/wp\/v2\/pages\/18"}],"collection":[{"href":"https:\/\/rtimage.us\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/rtimage.us\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/rtimage.us\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rtimage.us\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18"}],"version-history":[{"count":6,"href":"https:\/\/rtimage.us\/index.php?rest_route=\/wp\/v2\/pages\/18\/revisions"}],"predecessor-version":[{"id":48,"href":"https:\/\/rtimage.us\/index.php?rest_route=\/wp\/v2\/pages\/18\/revisions\/48"}],"wp:attachment":[{"href":"https:\/\/rtimage.us\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}