2ls | Static Analyzer and Verifier
kandi X-RAY | 2ls Summary
kandi X-RAY | 2ls Summary
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QUESTION
I have recently started using GeoPandas to produce maps and find it extremely useful. I have used Pandas for a while and I have found the move to GeoPandas to be relatively painless. However, I'm having problems plotting points on a map following grouping the points using the .dissolve() function.
Basically, I have a selection of UK postcode data with associated longitude and latitude values downloaded from the Office for National Statistics Postcode Directory (ONSPD). The longitude and latitude values are based on CRS WGS84. I can convert to CRS OSGB36 and plot all the points on a map with no problem. However, if I groupby the points based on other variables (e.g. 'group1' and 'groups') using the .dissolve() method, I can no longer plot the points.
Here is the code I have so far to plot all the points together:
...ANSWER
Answered 2018-Apr-01 at 10:57The problem is that geopandas at this moment does not yet support plotting MultiPoints (and the dissolve
method grouped the Points into MultiPoints). The fact that you get a blank image instead of a good error message is somewhat unfortunate ..
But, there has just been a PR merged to add support for plotting MultiPoints: https://github.com/geopandas/geopandas/pull/683. So this will work in the next geopandas release.
A workaround for now is to plot the individual points, but to have to appropriate grouped colors, to add a column reflecting those groups:
QUESTION
I am using the inbuilt DataContractJsonSerializer
to prepare data for transmission.
I am Serializing from a business object using the following code:
...ANSWER
Answered 2017-Jul-26 at 12:08The Serializer is only going to serialize the data in the object. It won't carry the decorations on the class. The IsRequired attribute will trigger when the DataContract is sent back to the service.
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