##Open Parcel Viewer ####An OVRDC App Template
This open data parcel viewer is a client-side app that uses Leaflet to render a whole county parcel map without the need for a GIS server. Try out the demo. This app also includes the modern-ui custom OVRDC style for the search bar and layer control.
##Features
- Search by any field or multiple fields, such as Name and/or Parcel ID
- Sidebar, fullscreen, location, printing (using browser print dialog)
- Render up to (approx) 50k parcels
- Customized layer control with thumbnails
- Similar performance on mobile and desktop
##Requirements
- Data in topojson format, stored in the data folder - see mapshaper
- A string field in the data titled 'index' to house the searchable attributes (with a separator - see the example)
- Jekyll (or download the zip file and build the app manually)
- A free Mapbox API key for using the Mapbox imagery (not necessary, the esri imagery could be used instead)
- A (free) web server such as GitHub, surge.sh, others...
##Upgrades - Contributions Welcome
- Create an npm package for the js dependencies
- Convert from L.TileLayer.Canvas to L.GridLayer to be compatible with Leaflet 1.0
- Make a Jekyll option for using vector tiles styled in Mapbox
- Create a function to automatically split the index field and push all the index 'fields' to the popup or the sidebar
- Add an option to add/remove more/other tools to/from the toolbar
- Convert the toolbar from using leaflet-top leaflet-left to a new customized leaflet control
- Documentation on the various options in geojson-vt and the drawing on canvas function
- Add real support for multiple field search - possibly using fuse or typehead (like Leaflet Bootstrap)
##Issues
Past zoom level 18 the parcels disappear - this is an upstream issue with geojson-vtFixed 04/2016 - The default maxZoom for L.tileLayer.canvas (and L.tileLayer) is 18. In the L.CanvasTiles.js this has been changed to 22.- Pinch and zoom on touch devices causes strange behavior so it is disabled, use the zoom buttons (behind the sidebar) instead
- Zoom animations have been limited to 2 zoom levels for better performance
##Thanks This app relies on a variety of plugins, but most importantly on the work of mourner, Sumbera, Stephano Cudini and Matthew Bloch.
This app is powered by Jekyll.