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Hi Jürgen,
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<div class="">Try this instead:</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>$ echo 4447802.078667 -1111950.519667 | cs2cs +proj=sinu +to +proj=latlong +datum=WGS84</div>
<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>40d34'27.915"E 10d3'18.399"S 0.000</div>
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<div class="">WGS84 is not an <a href="http://proj4.org/operations/index.html" class="">operation</a> in PROJ. It is however a recognised as a datum that can be used in</div>
<div class="">conjunction with an operation such as “latlong”.</div>
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</div>
<div class="">Since what you are doing is really just converting projected sinusoidal coordinates to it’s originating</div>
<div class="">latitude and longitude you can also just do</div>
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</div>
<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>$ echo 4447802.078667 -1111950.519667 | proj -I +proj=sinu</div>
<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>40d34'27.915"E 10d3'18.399”S</div>
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<div class="">To reach the same result.</div>
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<div class="">/Kristian</div>
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<blockquote type="cite" class="">
<div class="">On 27 Mar 2018, at 12:13, Juergen Stumpe <<a href="mailto:jstumpe.ho@gmail.com" class="">jstumpe.ho@gmail.com</a>> wrote:</div>
<br class="Apple-interchange-newline">
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<div class="">Hello,<br class="">
<br class="">
I'm trying to convert Modis meter values to WGS84 decimal degrees,<br class="">
using the PROJ4 command line, but I'm not able to set the parameters<br class="">
correctly.<br class="">
<br class="">
E.g. the command "echo 4447802.078667 -1111950.519667 | cs2cs<br class="">
+proj=sinu +to +proj=WSG84" fails with "projection initialization<br class="">
failurecause: Unknown error".<br class="">
<br class="">
Does anybody know how the define the PROJ4 command line properly, in<br class="">
order to achieve a conversion with parameters according the attached<br class="">
TWCC screen shot?<br class="">
<br class="">
Thanks in advance!<br class="">
<br class="">
Juergen<br class="">
<span id="cid:2C6BA0D3-D08D-4AE2-AB5D-DF441B0C729F"><TWCC Screen Shot.PNG></span>_______________________________________________<br class="">
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http://lists.maptools.org/mailman/listinfo/proj</div>
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</blockquote>
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