restricting input dataset coordinate system

JeffKaiden1

How does one restrict the input datasets to a certain coordinate system projection?

I think it involves setting up some kind of parameter dependency filter that I have been writing in the def getParameterInfo(self): section of a python script.

param03 = arcpy.Parameter(displayName = 'Input Regional DAMAGE_POINTS_FLAT_ALBERS dataset(s) from file (no need to load into the Table of Contents)',
name = 'Input_Regional_Damage_Point_Dataset',
datatype = 'DEFeatureClass',
parameterType = "Required",
direction = "Input",
multiValue = True)
param03.filter.list = ["Point","Multipoint"]

I also want to restrict this points and multipoints to the albers projection (or any specific coordinate system).

I presume it is something like this, but have been unable to figure it exactly out:

patam03.parameterDependencies

perhaps with enviroment worked in: param03.parameterDependencies.environment

Thanks, for I am a python novice willing to jump in and try to figure out syntax, but have had no formal python training.

DanPatterson_Retired

Provide the check and if it isn't what you want, bail.

<SPAN class="keyword token">from</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da <SPAN class="keyword token">import</SPAN> Describe 

<SPAN class="comment token"># Spatial reference object</SPAN>
<SPAN class="keyword token">def</SPAN> <SPAN class="token function">get_SR</SPAN><SPAN class="punctuation token">(</SPAN>in_fc<SPAN class="punctuation token">,</SPAN> verbose<SPAN class="operator token">=</SPAN><SPAN class="token boolean">False</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
    <SPAN class="string token">"""Return the spatial reference of a featureclass."""</SPAN>
    desc <SPAN class="operator token">=</SPAN> Describe<SPAN class="punctuation token">(</SPAN>in_fc<SPAN class="punctuation token">)</SPAN>
    SR <SPAN class="operator token">=</SPAN> desc<SPAN class="punctuation token">[</SPAN><SPAN class="string token">'spatialReference'</SPAN><SPAN class="punctuation token">]</SPAN>
    <SPAN class="keyword token">if</SPAN> verbose<SPAN class="punctuation token">:</SPAN>
        <SPAN class="keyword token">print</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"SR name: {}  factory code: {}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>SR<SPAN class="punctuation token">.</SPAN>name<SPAN class="punctuation token">,</SPAN> SR<SPAN class="punctuation token">.</SPAN>factoryCode<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
    <SPAN class="keyword token">return</SPAN> SR‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Note that "Describe"  in the 'da' module has a 'spatialReference' access point.  On line 9, you can use a variety of things (name, factoryCode etc) to compare against.  so just pull in the information from the featureclass, get its SR and compare, bailing if it doesn't match