<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-ligatures:standardcontextual;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
font-size:10.0pt;
font-family:"Courier New";}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
mso-ligatures:standardcontextual;}
span.EmailStyle22
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">Thanks for the helpful background, Even.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jesse<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Even Rouault <even.rouault@spatialys.com><br>
<b>Date: </b>Wednesday, January 10, 2024 at 1:01 PM<br>
<b>To: </b>"Meyer, Jesse R. (GSFC-618.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <jesse.r.meyer@nasa.gov>, "gdal-dev@lists.osgeo.org" <gdal-dev@lists.osgeo.org><br>
<b>Subject: </b>Re: [EXTERNAL] Re: [gdal-dev] Lack of srs importFromESRI integer function</span><span style="font-size:12.0pt;color:black;mso-ligatures:none"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" align="left" style="border:solid black 1.5pt">
<tbody>
<tr>
<td width="100%" style="width:100.0%;border:none;background:#FFEB9C;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly">
<b><span style="font-size:10.0pt;color:black">CAUTION:</span></b><span style="color:black">
</span><span style="font-size:10.0pt;color:black">This email originated from outside of NASA. Please take care when clicking links or opening attachments. Use the "Report Message" button to report suspicious messages to the NASA SOC.</span><span style="color:black">
</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
<o:p></o:p></p>
<div>
<p><o:p> </o:p></p>
<div>
<p class="MsoNormal">Le 10/01/2024 à 18:52, Meyer, Jesse R. (GSFC-618.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] a écrit :<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Thanks Even, we’ll try that.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Are there any known integer values that ESRI and EPSG conflate? If not, it would be convenient to simply pass in an integer to a single API function and be done with it.<o:p></o:p></p>
</blockquote>
<p>I believe not. Codes in the [1,32767] range should lead to equivalent definitions under both authorities. But when they are really the same, to save space and confusion to users, they are not imported under the ESRI authority and are only available under
the EPSG ones. So codes in the [1,32767] under the ESRI authorities are basically for CRS names that are slightly different spelled by ESRI (but otherwise with a definition compatible of the EPSG one). There are also very ancient deprecated CRS that were imported
from EPSG, but were deprecated by EPSG so long ago that they are not in the EPSG database anymore (like
<a href="https://spatialreference.org/ref/esri/31491/">https://spatialreference.org/ref/esri/31491/</a>).<o:p></o:p></p>
<p>But there's no only EPSG and ESRI in life :-) The IAU authority for example uses numeric code in the ranges of what could be used by EPSG or ESRI.<o:p></o:p></p>
<p>So it is really the tuple (authority_name,code) that conveys a primary key.<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Jesse<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Even Rouault
<a href="mailto:even.rouault@spatialys.com"><even.rouault@spatialys.com></a><br>
<b>Date: </b>Wednesday, January 10, 2024 at 12:48 PM<br>
<b>To: </b>"Meyer, Jesse R. (GSFC-618.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <a href="mailto:jesse.r.meyer@nasa.gov">
<jesse.r.meyer@nasa.gov></a>, <a href="mailto:gdal-dev@lists.osgeo.org">"gdal-dev@lists.osgeo.org"</a>
<a href="mailto:gdal-dev@lists.osgeo.org"><gdal-dev@lists.osgeo.org></a><br>
<b>Subject: </b>[EXTERNAL] Re: [gdal-dev] Lack of srs importFromESRI integer function</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" align="left" style="border:solid black 1.5pt">
<tbody>
<tr>
<td width="100%" style="width:100.0%;border:none;background:#FFEB9C;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly">
<b><span style="font-size:10.0pt;color:black">CAUTION:</span></b><span style="color:black">
</span><span style="font-size:10.0pt;color:black">This email originated from outside of NASA. Please take care when clicking links or opening attachments. Use the "Report Message" button to report suspicious messages to the NASA SOC.</span><span style="color:black">
</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
<br>
<o:p></o:p></p>
<div>
<p>Jesse,<o:p></o:p></p>
<p>You can use SetFromUserInput("ESRI:XXXX") . ImportFromEPSG(code) more or less does SetFromUserInput("EPSG:{code}")<o:p></o:p></p>
<p>Even<o:p></o:p></p>
<div>
<p class="MsoNormal">Le 10/01/2024 à 18:44, Meyer, Jesse R. (GSFC-618.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] via gdal-dev a écrit :<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Our team has moved away from providing geographic / projected CRS codes as strings and prefer using integers where possible. However, in the C++ API, I only see an integer based importFromEPSG function, which doesn’t appear to accept ESRI
codes (crs not found error message). We’re targeting an Albers projection which is distinguished by an ESRI integer.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Curiously, the proj database doesn’t seem to make this distinction – the table column is simply ‘code’ and I can find the projection row manually, alongside EPSG projections.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Can such a function be provided by the API (if it doesn’t already exist – I couldn’t find it – there are no integer overloads of importFromESRI)?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Please advise -- thanks,<o:p></o:p></p>
<p class="MsoNormal">Jesse<o:p></o:p></p>
<p class="MsoNormal"><span style="mso-ligatures:none"><br>
<br>
<br>
</span><o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>gdal-dev mailing list<o:p></o:p></pre>
<pre><a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a><o:p></o:p></pre>
<pre><a href="https://lists.osgeo.org/mailman/listinfo/gdal-dev">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a><o:p></o:p></pre>
</blockquote>
<pre>-- <o:p></o:p></pre>
<pre><a href="http://www.spatialys.com/">http://www.spatialys.com</a><o:p></o:p></pre>
<pre>My software is free, but my time generally not.<o:p></o:p></pre>
</div>
</blockquote>
<pre>-- <o:p></o:p></pre>
<pre><a href="http://www.spatialys.com/">http://www.spatialys.com</a><o:p></o:p></pre>
<pre>My software is free, but my time generally not.<o:p></o:p></pre>
</div>
</div>
</body>
</html>