Best way to overlay an ESRI shapefile on google maps

Question

What is the best way to overlay a shapefile in Google Maps    After some reading suggests that  converting shapefile into KML and overlaying KML in Google map is an option  If that is the case  how do I convert a shapefile into KMLs    I believe there would be a few open source tools available for this conversion  Can anyone point to a tool to covert a shapefile to KML without any loss of data

User · Answer

Do you mean shapefile as in an Esri shapefile? Either way, you should be able to perform the conversion using ogr2ogr, which is available in the GDAL packages. You need the .shp file and ideally the corresponding .dbf file (which will provide contextual information).

Also, consider using a tool like MapShaper to reduce the complexity of your shapefiles before transforming them into KML; you'll reduce filesize substantially depending on how much detail you need.

User · Answer

2018 already    I ve found this fantastic online tool http   mapshaper org  to convert from ESRI shapefiles to SVG  TopoJSON  GeoJSON   Here is the explanation of how to use it https   www statsilk com maps convert-esri-shapefile-map-geojson-format  Fast and straightforward

User · Answer

Free  Export to KML  script for ArcGIS 9  Here is a list of available methods that someone found   Also  it seems to me that the most efficient representation of a polygon layer is by using Google Maps API s polyline encoding  which significantly compresses lat-lng data  But getting into that format takes work  use ArcMap to export Shape as lat lng coordinates  then convert into polylines using Google Maps API

User · Answer

I would not use KML  Instead  use GeoJSON which you can natively consume in Google Maps API now  It is a newer feature that didn t exist from the original responses     In any case  simply open the SHP file in Quantum GIS  and then you can output it in any format you like  KML  GeoJSON     If you are using Google Maps for Work  I found a premium extension that handles loading shapefiles directly where you can just connect direct to the shapefile that you generate from ESRI  I did a search on the CMaps site and found this snippet which loaded US by state shapefile  https   gmapsplugin net cmapsanalytics assets shapes usstates shp  var cMap   new centigon locationIntelligence MapView        cMap key  your api key          cMap layerNames   Basic Shapes         cMap dbfKeys    Alabama   Alaska   Arizona   Arkansas   California   Colorado   Connecticut   Delaware   District of Columbia   Florida   Georgia   Hawaii   Idaho   Illinois   Indiana   Iowa   Kansas   Kentucky   Louisiana   Maine   Maryland   Massachusetts   Michigan   Minnesota   Mississippi   Missouri   Montana   Nebraska   Nevada   New Hampshire   New Jersey   New Mexico   New York   North Carolina   North Dakota   Ohio   Oklahoma   Oregon   Pennsylvania   Rhode Island   South Carolina   South Dakota   Tennessee   Texas   Utah   Vermont   Virginia   Washington   West Virginia   Wisconsin   Wyoming          cMap userShapeKeys    Massachusetts   Minnesota   Montana   North Dakota   Hawaii   Idaho   Washington   Arizona   California   Colorado   Nevada   New Mexico   Oregon   Utah   Wyoming   Arkansas   Iowa   Kansas   Missouri   Nebraska   Oklahoma   South Dakota   Louisiana   Texas   Connecticut   New Hampshire   Rhode Island   Vermont   Alabama   Florida   Georgia   Mississippi   South Carolina   Illinois   Indiana   Kentucky   North Carolina   Ohio   Tennessee   Virginia   Wisconsin   West Virginia   Delaware   District of Columbia   Maryland   New Jersey   New York   Pennsylvania   Maine   Michigan   Alaska           cMap labels    Massachusetts   Minnesota   Montana   North Dakota   Hawaii   Idaho   Washington   Arizona   California   Colorado   Nevada   New Mexico   Oregon   Utah   Wyoming   Arkansas   Iowa   Kansas   Missouri   Nebraska   Oklahoma   South Dakota   Louisiana   Texas   Connecticut   New Hampshire   Rhode Island   Vermont   Alabama   Florida   Georgia   Mississippi   South Carolina   Illinois   Indiana   Kentucky   North Carolina   Ohio   Tennessee   Virginia   Wisconsin   West Virginia   Delaware   District of Columbia   Maryland   New Jersey   New York   Pennsylvania   Maine   Michigan   Alaska            cMap polyDataSources  centigon locationIntelligence CMapAnalytics DATA PROVIDERS SHAPE DATAPROVIDER        cMap layerTypes  centigon mapping Layer TYPE POLY        cMap locations    https   gmapsplugin net cmapsanalytics assets shapes usstates shp           cMap panTo  USA        cMap zoomLevel 3

User · Answer

as of 12 03 2019 FusionTables is no more     Import the Shapefile into Google FusionTables   http   www google com fusiontables   using http   www shpescape com  and from there you can use the data in a number of ways  eg  display it using GoogleMaps

User · Answer

I like using  open source and gui friendly  Quantum GIS to convert the shapefile to kml   Google Maps API supports only a subset of the KML standard   One limitation is file size   To reduce your file size  you can Quantum GIS s  simplify geometries  function  This  smooths  polygons   Then you can select your layer and do a  save as kml  on it   If you need to process a bunch of files  the process can be batched with Quantum GIS s ogr2ogr command from osgeo4w shell   Finally  I recommend zipping your kml  with your favorite compression program  for reduced file size and saving it as kmz

User · Answer

Just to update these answers  ESRI has included this tool  known as Layer to KML in ArcMap 10 X   Also  a Map to KML tool exists    Simply import the desired layer  vector or raster  and choose the output location  resolution  etc  Very simple tool

[google-maps] Best way to overlay an ESRI shapefile on google maps?

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