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modificar simbologia
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import json | |
import xmltodict | |
def show_only_styled_values(featurelayer, layerfile, fieldname): | |
"""show_only_styled_values(featurelayer, layerfile, fieldname) | |
Funcion que permite actualizar la simbologia de una capa y solo mostrar las clases que contienen valores | |
INPUTS: | |
featurelayer (Feature Layer) : nombre de layer presente en el mxd. | |
layerfile (String): Ruta de archivo de tipo .lyr || O nombre de layer presente en el mxd. | |
fieldname (String): Nombre de campo que se usa para la simbologia tipo texto | |
""" | |
# Convertimos la ruta a un archivo tipo layer | |
mxd = arcpy.mapping.MapDocument("current") | |
flayer = arcpy.mapping.ListLayers(mxd,featurelayer)[0] | |
lyr = arcpy.mapping.Layer(layerfile) | |
# Creamos una lista de las clasese existentes en el featurelayer | |
classes_present = list(set([f[0] for f in arcpy.da.SearchCursor(featurelayer, fieldname)])) | |
# Creamos una lista de simbologias vacias | |
simbologias = [] | |
idxs =[] | |
# obtenemos el diccionario de simbologias del lyr | |
sym_dict = json.loads(lyr._arc_object.getsymbology()) | |
sym_xml = lyr._arc_object.renderer | |
xpars = xmltodict.parse(sym_xml) | |
symbols = [] | |
values = xpars["Renderer"]["UniqueValueInfos"]["UniqueValueInfo"] | |
for value in values: | |
if value['Value'] in classes_present: | |
symbols.append(value) | |
xpars["Renderer"]["UniqueValueInfos"]["UniqueValueInfo"] = symbols | |
sym_xml_final = xmltodict.unparse(xpars) | |
flayer._arc_object.renderer = sym_xml_final | |
arcpy.RefreshActiveView() | |
def modify_field_class(new_field, old_field, lyr): | |
lyr = # Layer object, typically from arcpy.mapping.ListLayers (arcpy._mapping.Layer) | |
# Example 1a: Modifying single-field renderer using undocumented _arc_object.renderer | |
new_field = # New field name for symbolizing layer | |
old_field = # Old field name for symbolizing layer | |
sym_xml = lyr._arc_object.renderer | |
lyr._arc_object.renderer = sym_xml.replace(old_field, new_field) | |
arcpy.RefreshActiveView() | |
# Example 1b: Modifying single-field renderer using updateLayerFromJSON | |
new_field = # New field name for symbolizing layer (string) | |
sym_dict = json.loads(lyr._arc_object.getsymbology()) | |
sym_dict["renderer"]["field1"] = new_field | |
lyr.updateLayerFromJSON(json.dumps({"drawingInfo": sym_dict})) | |
arcpy.RefreshActiveView() |
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