Latest Contributions by J_R_Matchett

‎11-18-2021

You can update the feature layer with new spatial data frame. For example: # convert merged spatial data frame to feature set updated_features = merged_sdf.spatial.to_featureset() # update the feature layer update_result = feature_layer.edit_features(updates=updated_features)

‎11-12-2021

You can use Shapely's unary_union to dissolve geometries. For example: from arcgis.features import FeatureLayer from shapely.ops import unary_union from arcgis.geometry import Geometry # query some counties counties_layer = FeatureLayer('https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/USA_Counties_Generalized/FeatureServer/0') counties = counties_layer.query( where="STATE_NAME IN ('California', 'Oregon', 'Washington')", out_fields='NAME,STATE_NAME', as_df=True ) # function to dissolve polygons def dissolve_polys(polys): # convert to shapely polygons, using the buffer(0) trick to correct invalid polygons shapely_polys = [s.as_shapely.buffer(0) for s in polys] # union polygons dissolved_poly = unary_union(shapely_polys) # convert back to arcgis geometry return Geometry(dissolved_poly.__geo_interface__, spatialReference=polys.iloc[0].spatialReference) # dissolve county polygons by state counties_dissolve = counties\ .groupby('STATE_NAME')\ .apply(lambda x: dissolve_polys(x.SHAPE))\ .reset_index(name='SHAPE') NOTE: There can be issues converting between Shapely and Esri polygons, so check your output shapes. In the counties example above, several island polygons (such California's Channel Islands) don't get included in the dissolved polygon.

‎11-10-2021

Does excluding the created_user, created_date, last_edited_user, and last_edited_date attributes from the feature make a difference? Those attributes are typically automatically set by the feature service if they were added to the feature service when editing was enabled.

‎03-01-2020

You can get a list of the unique values in a column from a spatially-enabled data frame, for example: power_users = power_users_layer.query(as_df=True) existing_users = power_users.username.unique() ‍‍‍‍‍‍ Then use the in operator to check if a given user is in that list. If you post the code you have so far we could give some more specific guidance.

‎03-01-2020

Here's a method I wrote for GeoDataFrame to return an arcgis spatially-enabled dataframe (SEDF): import warnings from arcgis.geometry import Geometry from arcgis.features import GeoAccessor, GeoSeriesAccessor from pandas import DataFrame from geopandas import GeoDataFrame def to_SpatialDataFrame(self, spatial_reference=None): """Returns an arcgis spatially-enabled data frame. Arguments: spatial_reference Either None or a spatial reference integer code. If None, the spatial reference will be extracted from the GeoDataFrame if it is defined using an EPSG code. """ if not spatial_reference: crs = self.crs epsg_code = crs.to_epsg() if epsg_code: spatial_reference = {'wkid': epsg_code} else: spatial_reference = {'wkid': 4326} warnings.warn('Unable to extract a spatial reference, assuming latitude/longitude (EPSG 4326).') else: spatial_reference = {'wkid': spatial_reference} sdf = DataFrame(data=self.drop(self.geometry.name, axis=1)) sdf['SHAPE'] = [Geometry.from_shapely(g, spatial_reference) for g in self.geometry.tolist()] sdf.spatial.set_geometry('SHAPE') return sdf GeoDataFrame.to_SpatialDataFrame = to_SpatialDataFrame ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ The resulting SEDF can then be published or used to update an existing feature layer.

‎02-24-2020

Hmmm, maybe this is the issue. I briefly received this page when attempting to visit the feature layer's web page:

‎02-24-2020

I'm trying to query a particular feature layer (https://www.visalia.city/server/rest/services/OpenData/CurrentAddresses/FeatureServer/0) but receive a JSONDecodeError. Here's my code and result: from arcgis.features import FeatureLayer adds_layer = FeatureLayer('https://www.visalia.city/server/rest/services/OpenData/CurrentAddresses/FeatureServer/0') adds = adds_layer.query() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/features/layer.py", line 1019, in query record_count = self._query(url, params, raw=as_raw) File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/features/layer.py", line 1960, in _query raise queryException File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/features/layer.py", line 1930, in _query postdata=params, token=self._token) File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/gis/__init__.py", line 10101, in _token self._hydrate() File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/gis/__init__.py", line 10071, in _hydrate self._refresh() File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/gis/__init__.py", line 10038, in _refresh raise e File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/gis/__init__.py", line 10033, in _refresh dictdata = self._con.post(self.url, params, token=self._lazy_token) File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/site-packages/arcgis/_impl/connection.py", line 1148, in post resp_json = json.loads(resp_data) File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/json/__init__.py", line 348, in loads return _default_decoder.decode(s) File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/json/decoder.py", line 337, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/Users/jrmatchett/opt/anaconda3/envs/arcgis17/lib/python3.7/json/decoder.py", line 355, in raw_decode raise JSONDecodeError("Expecting value", s, err.value) from None json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0) ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ I can access and query the layer just fine via its webpage or when adding it to a web map. Accessing some other feature layer properties, such as properties and metadata, generates the same error. I experience the issue when using either versions 1.6.2 or 1.7.1 of the arcgis python API.

‎01-06-2020

I was having the same issue and this post on GIS Stack Exchange led me to the solution. The post data needs to be passed as a dictionary with an 'addresses' key and the records converted to a JSON string as its value. Using your example: import json r = requests.post(url=URL, params=params, data={'addresses': json.dumps(addresses)})‍‍

‎11-11-2019

Here's a useful post on the various date/time query formats for feature services: Querying Feature Services: Date-Time Queries

‎07-30-2019

It seems like something became corrupted with the layer's popup. I changed the popup type from "A list of field attributes" to "A description from one field" and was able to again select points in Collector. I then changed the popup back to "A list fo field attributes" and selection continues to work.

‎07-29-2019

I am experiencing this issue also, although on iPhone. For about a day or so, I could successfully select and edit features, then all of a sudden it stopped working. I tried creating a new feature layer, and again it initially worked then stopped. I tried reinstalling the Collector app, but no difference. I'm also unable to select features in the Explorer app. However, the Collector Classic app still works properly.

‎06-21-2019

Yes, you can query the features you want, access the SpatialDataFrame, and export to a shapefile. For example: layer = item.layers[0] features = layer.query('created_date >= CURRENT_TIMESTAMP - 7') features.sdf.spatial.to_featureclass('./output.shp')‍‍‍‍‍‍‍‍‍ The output shapefile will be saved locally in this case.

‎05-04-2019

Yes you can add an image to your content using the ArcGIS API for Python. For example: from arcgis import GIS gis = GIS(username='username', password='password') image_item = gis.content.add( item_properties={'type': 'Image'}, data='path_to_image_file' )‍‍‍‍‍‍‍‍‍‍‍‍‍‍

‎04-24-2019

I was able to accomplish this for my organization's AGOL portal, but had to subclass and modify some methods of the GIS, Portal, and ArcGISConnection classes so they could handle an existing token. Here's the code. It's doing some other things like using the selenium package to automate SAML authentication, but focusing on how the tokens parameter and existing_tokens variable are being handled may give you some leads for your situation.

‎06-09-2018

Does converting the SpatialDataFrame to a FeatureSet work? subset_map.add_layer(output.to_featureset(), { "renderer":"ClassedColorRenderer", "field_name":"stress_likelihood" })‍‍

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Date Last Visited	‎04-13-2024 07:45 PM

My Ideas

Latest Contributions by J_R_Matchett

Re: Overwrite a service from a spatial data frame

Re: Can I dissolve polygons in spatially enabled dataframe?

Re: Upload GPS points to Track using Python

Re: Check for the existence of a value in a field

Re: Creating / updating feature layer in ArcGIS Online from geopandas GeoDataFrame?

Re: JSONDecodeError When Accessing a Feature Layer

JSONDecodeError When Accessing a Feature Layer

Re: Using the POST Method for Batch Geocoding with ArcGIS Server?

Re: Python API query string

Re: Collector not able to select or edit on Android

Re: Collector not able to select or edit on Android

Re: How can I export a Feature Layer in AGOL to Shapefile, using API for Python?

Re: Add Photo to Content via Api

Re: Authenticating AGOL through SAML with Token using python

Re: Add a column to a layer object (inner join) then map amended layer

Re: Overwrite a service from a spatial data frame

Re: How can I export a Feature Layer in AGOL to Sh...

Re: Creating / updating feature layer in ArcGIS On...

Re: Issues with shapely and polygons having holes

Re: Import issue in arcgis version 1.4.1