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Get parameter as text

SadroddinAlavipanah1

I have 5 parameters in my arcpy script, imported into a toolbox.

inputFC = arcpy.GetParameterAsText(0)

outputFC = arcpy.GetParameterAsText(1)

heightfield = arcpy.GetParameterAsText(2) #Must be in the same units as the coordinate system!

azimuth = math.radians(float(arcpy.GetParameterAsText(3))) #Must be in degrees

altitude = math.radians(float(arcpy.GetParameterAsText(4))) #Must be in degrees

I have building footprints, including height in the attribute, and I want to compute the shadow of the building in 2D.

Could anyone tell me which 'Data type' and parameter properties I should define before running the script? Thanks

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Accepted answers

FreddieGibson

Is there a reason why you're specifying the Azimuth and Altitude values as Any Value and not Double? The Any Value type would allow you to insert alphanumeric text and I'd assume you'd need to add logic into your code to account for this. For example, Any Value would allow you to provide values like 90° or EAST or 90.0, whereas Double would restrict you to 90.0. You could also use validation logic to verify that your azimuth or altitude values are within the expected ranges. I've included a quick example of the logic below.

<SPAN class="keyword token">import</SPAN> arcpy
<SPAN class="keyword token">class</SPAN> <SPAN class="token class-name">ToolValidator</SPAN><SPAN class="punctuation token">(</SPAN>object<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp; <SPAN class="string token">"""Class for validating a tool's parameter values and controlling
&nbsp; the behavior of the tool's dialog."""</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">__init__</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Setup arcpy and the list of tool parameters."""</SPAN>
&nbsp;&nbsp;&nbsp; self<SPAN class="punctuation token">.</SPAN>params <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterInfo<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">initializeParameters</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Refine the properties of a tool's parameters.&nbsp; This method is
&nbsp;&nbsp;&nbsp; called when the tool is opened."""</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">updateParameters</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Modify the values and properties of parameters before internal
&nbsp;&nbsp;&nbsp; validation is performed.&nbsp; This method is called whenever a parameter
&nbsp;&nbsp;&nbsp; has been changed."""</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">updateMessages</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Modify the messages created by internal validation for each tool
&nbsp;&nbsp;&nbsp; parameter.&nbsp; This method is called after internal validation."""</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>value <SPAN class="operator token"><</SPAN> <SPAN class="number token">0.0</SPAN> <SPAN class="operator token">or</SPAN> self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>value <SPAN class="operator token">></SPAN> <SPAN class="number token">360.0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>setErrorMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Value must be 0 to 360"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>clearMessage<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN>
<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>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

SadroddinAlavipanah1

Thanks, It worked finally perfect!

FreddieGibson

<SPAN class="keyword token">import</SPAN> arcpy
<SPAN class="keyword token">class</SPAN> <SPAN class="token class-name">ToolValidator</SPAN><SPAN class="punctuation token">(</SPAN>object<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp; <SPAN class="string token">"""Class for validating a tool's parameter values and controlling
&nbsp; the behavior of the tool's dialog."""</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">__init__</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Setup arcpy and the list of tool parameters."""</SPAN>
&nbsp;&nbsp;&nbsp; self<SPAN class="punctuation token">.</SPAN>params <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterInfo<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">initializeParameters</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Refine the properties of a tool's parameters.&nbsp; This method is
&nbsp;&nbsp;&nbsp; called when the tool is opened."""</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">updateParameters</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Modify the values and properties of parameters before internal
&nbsp;&nbsp;&nbsp; validation is performed.&nbsp; This method is called whenever a parameter
&nbsp;&nbsp;&nbsp; has been changed."""</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN>

&nbsp; <SPAN class="keyword token">def</SPAN> <SPAN class="token function">updateMessages</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""Modify the messages created by internal validation for each tool
&nbsp;&nbsp;&nbsp; parameter.&nbsp; This method is called after internal validation."""</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>value <SPAN class="operator token"><</SPAN> <SPAN class="number token">0.0</SPAN> <SPAN class="operator token">or</SPAN> self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>value <SPAN class="operator token">></SPAN> <SPAN class="number token">360.0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>setErrorMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Value must be 0 to 360"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; self<SPAN class="punctuation token">.</SPAN>params<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>clearMessage<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN>
<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>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

JenniferMcCall4

I think the code may be failing on this section:

&nbsp;&nbsp;&nbsp; # Create in-memory feature class for holding the shadow polygons
&nbsp;&nbsp;&nbsp; tempshadows = r"in_memory\tempshadows"
&nbsp;&nbsp;&nbsp; arcpy.CreateFeatureclass_management(
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "in_memory",
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "tempshadows",
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "POLYGON", "", "", "",
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; outputSR)
&nbsp;&nbsp;&nbsp; arcpy.AddField_management(tempshadows, origfidfield, "LONG")

The syntax for the Create Feature Class tool is:

CreateFeatureclass_management (out_path, out_name, {geometry_type}, {template}, {has_m}, {has_z}, {spatial_reference}, {config_keyword}, {spatial_grid_1}, {spatial_grid_2}, {spatial_grid_3})

It looks like you are creating a feature class called in_memory\in_memory\tempshadows - and I think one of the in_memory's needs to be removed.

SadroddinAlavipanah1

The height value is not a constant value through the whole building shapefile. It varies from one polygon to another. Its the same data you have commented on the other question of mine: HERE is there a 'data type' where it can import the value of a column of attribute (building height). And I have tried it with the following parameters:

I've typed 'Building_H' at the height field, but then ended up with:

JenniferMcCall4

I agree with Neil. The "Any Value" option would work well.

In addition to this, if your heightfield parameter should have a field as the input, you can use "Field" for the data type. You can then loop through the values in the field within the script.

If you want to validate that the input values for heightfield, azumuth, and altitude are in the correct data type (ex; degrees) you can add some code to validate the values. Ex; loop through all azimuth values to ensure they are of the float data type and all between 0 and 360 - this would be done within the script after the parameters have been set, but before the rest of the script executes. Then just spit out a message to the user if the data is not in the correct format.

NeilAyres

The numbers (Height) etc could be added as any value

Also see here :

defining-parameter-data-types-in-a-python-toolbox

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