gisdata | GIS Sample Data | Map library

I am trying to plot gun violence occurrence coordinate points onto a shapefile map of New York. I applied a Google script to turn the original dataset street addresses into latitude and longitude coordinates. I exported it .csv into RStudio. Cleaned up the data a little more by removing unnecessary columns and NA values + changing the Lat. column to numeric.

I seem to have done everything right up until layering the points atop the shapefile map. When I run the following code, it returns the coordinate points separately from the map (see images attached). That is, they are not layered together so I can eventually use it to create a choropleth map. Also, the point image below doesn't seem to show all the latitude/longitude coordinates in the dataset. There are a total of 500 or so incidences with coordinate data provided spread out across the entire state of New York. I am not so confident in what is being shown, but that is probably a topic for another question.

So, I downloaded GIS data from one my state government's websites, http://rfa.sc.gov/mapping/gisdata, and I popped it into a free GIS tool called GrassGIS and exported the SVG data. The issue is that the code it generated is hundreds of lines long per path, and there are over 100 paths.

My text editor struggles with functioning when I have it open, and so I've had to isolate it to it's own HTML file and just load it in with PHP. But I still have to work within the file, and the ability to collapse sections, which is necessary to navigate through it, frequently stops working I assume because it overwhelms the text editor. The file by itself is 7,324 KB.

I've tried pasting the code of individual paths into various SVG simplifier/minimizer websites, but I get error messages, I'm guessing because it's too big.

Does anyone know of any solutions in dealing with files like these, or simplifying them? I don't need the precise GIS data, which I'm assuming is why it's so large, I just need the rough shapes the data makes. Any websites or methods that could simplify the shapes, or free GIS software that might export a better SVG file would be appreciated. Any suggestions at all.

We have an angular5 application with an embedded leaflet map. This map binds a popup to various points which in turn open a details component. This convoluted process works fine in chrome and firefox but is failing with an enigmatic "Syntax error" in Internet Explorer. You can view the app at: http://ptappdev.gisdata.mn.gov/ptappt

Click on any of the map markers and then click "view details".

In case it is a problem with javascript nested quotes I have tried a whole range of escaping patters. Still no luck. The code generating this popup is: