Looking for a way to crowd-source polygon creation on Google Maps (in a wiki environment) that doesn't involved ESRI's expensive server software.  Requirements:     a bunch of different wiki pages can be updated with a map showing a single polygon. all the polygons over the entire site are combined into one master map preferably everything in KML so Fusion Tables can be involved for styling, but not necessary   Any ideas?
22013
I am looking at collecting spatial information from a range of stakeholders to identify opportunities within a landscape.  However, the data that we are collecting are not presently mapped and so we wish to use an interactive method to get this information onto a map.  Which online websites/methods would people recommend for circulating to a non-technical audience to try and get them to map what they know?    Where the emphasis is on ease of use by the stakeholder.
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I see a lot of questions going from Polygons to MultiPolygon, but is there some easy way to go the other way around? It would also be useful to preserve the attributes from the MultiPolygon to apply to the new Polygons.
45921
Would like to emulate google maps' driving directions functionality but use pgRouting instead. google's data over the project area &amp; scale is quite a bit off so we want to use our own transport network data in postGIS.  any hints?  thanks.
43716
I've converted a shapefile with attributes to a .kml for a client.  The .kml and attributes were then edited within google earth.  I received the updated .kml and now I need to get it back to .shp.  The problem is: all of my attributes are now in html format, which makes the popup info box in google earth.  When I try to convert back to .shp my attributes get lumped into a (google created) "Description" field.  And ALL of my attributes and information is lumped into a single cell.  Is there some way to extract the data from the "Description" field.  Even if I do that, is there an easy way to get rid of the html format and make it usable?   This is what I get using the "Fusion Table" method I found on some forums.  You can see the html in the left, it continues on further than it shows.    I am using ArcGIS Desktop 10.2.
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I've done the following process:   take a set of points, each one representing a hotel with a field that says the "neighborhood" that the hotel is in (field is called "full_hierarchy") Performed SNN clustering on these points Created Voronoi Polygons using the clusters Dissolved the Voronoi polygons on the field "full hierarchy")   And I get this:    My problem is that there are bits of each polygon inside of other polygons, as you can see in my image where I have highlighted one of my neighborhoods.  Any ideas how I can get rid of these bits so that each of my polygons is complete with no "islands" in them?  I am going to be doing this on a mass scale, so I need a process that I can do on QGIS   Would also be interested in smoothing the polygons, if possible.  EDIT: Using the options recommended to be below when using the eliminate sliver polygons:    But the output layer looks exactly the same - nothing changes?
7649
I would like to build a cartogram map using Web GIS.   I have a basemap and a set of raw data in excel.   I wondered what are the steps to build up a cartogram map using Web GIS?  Note: Originally this Question solicited Answers for both Web GIS and ArcGIS for Desktop.  A new Question has been asked focussed on ArcGIS for Desktop () and so this one has now been focussed on Web GIS (which itself is still quite broad).
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I've created polygons from a table that has two columns- an OBJECTID and a string of coordinates (Polygon_Coordinates). The resulting polygons (called &quot;testing&quot; in the code below) are in the correct locations, but I can't seem to figure out how to carry over the ID, which I need for a join later in the workflow. Any idea on how to build geometry, but maintain the attributes? fields = ['Polygon_Coordinates', 'OBJECTID']  with arcpy.da.SearchCursor(table, fields) as table_cursor:     for row in table_cursor:         #skip null rows         if row[0] != '-9999':                          #turn string of coordinates into a list but split them at the commas             coords= list(row[0].split(','))                          #break up list into list of pairs             pairs = [coords[i:i + 2] for i in range(0, len(coords), 2)]             coord_ints = [[float(i) for i in p] for p in pairs]              #create insert cursor for geometry creation             geocursor = arcpy.da.InsertCursor(testing, [&quot;SHAPE@&quot;])             array = arcpy.Array()                          #grab pairs from list, put into array             for a in pairs:                 array.add(arcpy.Point(a[1],a[0], ID=row[1]))                          #set crs, build polygon              wgs = arcpy.SpatialReference(4326)             poly = arcpy.Polygon(array, wgs)             geocursor.insertRow([poly])
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I need to add Google Map with about 400 markers into WordPress site (into one page). Every marker needs to have info window with photo, description and link. It is really high number of markers, so I'm not sure what is the best way to implement that kind of map.   What do you suggest?
30404
I'm creating a world made of cubes, similar to cube world game. Is there any quick way to create a map made of cubes that looks like this?
118693
I'm trying to create 5 maps in composer showing the same layer features but different extents of a map (attached an image to give everyone an example). I've opted to use atlas to save me manually creating 5 maps... but I have hit a barrier.   I think where I am going wrong is that I am trying to create an atlas based off a point layer (which is my coverage layer) so it is creating individual maps (about 60 +) for the points displayed.   However... I would like atlas to generate 5 maps for the different geographical extents that cover those points?   I right in thinking that I'll have to go and create a polygon shapefile that creates say a bounding box around 5 different areas to contain the points of interest? &amp; then select this as my coverage layer when generating an atlas?  Does anyone know a way to achieve what I am trying to do? Any views or general help would be great.
12074
I have a shapefile of size 224 MB. I am using ArcGIS to convert it to a KML file. The process involves converting the shapefile to a feature layer and then converting the layer to KML.   An alternative method that I have tried is using ogr2ogr.  In both the cases, the KML file produced is around 500 MBs. I need it to be less than 250 MBs, so I can import it as a Google Fusion table.  I was informed that one of the best ways to cut size is to reduce precision of the coordinates to 5 decimal places (from its current 10 or so).  How do I go about changing the decimal places using either ogr2ogr or ArcGIS? Is there some other software that may help in this and also, are there any other strategies I may use to reduce the size of the KML file?  I tried using Notepad++ to open the KML file and then use regular expressions to change coordinate precision but for some reason this method is not working. If I make the change and try and save the file, all the data gets deleted and the KML file size changes to 0 bytes.  An alternative strategy that I was thinking of was to split my shapefiles into two or three files and convert them to KML separately, upload them to Google fusion tables and then append those. However, I am not sure of two things.   How to split shapefiles into two or three smaller shapefiles? Whether I can easily append fusion tables together to create a larger fusion table?
66355
I am looking for a simple georeferenced 3D-data format to store very simple building models. Each building should be represented as a number of poylgons, semantics do not matter. It would be ideal if this format is readable via ArcGIS, but that is not an absolute requirement.  I know there is GML/CityGML but I am looking for something simpler that ideally has either a JSON or XML serialization.
80307
After looking through all the stuff that was released or talked about at the Esri UC 2013  I am still genuinely confused by what  is. I will admit that it looks pretty cool, and has , but I just do not know how it is different from ArcMap or ArcGIS Online.  Does anybody have any clearer answers beyond the flashy video and homepage?
110773
I have no skills in GIS, "map-making," or any other map program. Been a county planner for 25 yrs, where there was always a "drafting" staff.  I'm in another agency now and need to be able to produce basic and attractive site plans and area maps.  Is QGIS the right tool? I saw on a planners' website that it's free to download, along with GIMP and SketchUP.  I need some genuine advice on this, not something impossibly technical for my situation, nor a smug brush-off.
102157
When searching Google Maps for a city, the city's administrative boundary is displayed.    Is there a way to get the polygon boundaries of City in a JSON format using google maps api?
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I'm looking for a qml file (or equivalent e.g. sld) to allow me to use QGIS to take OpenStreetMap data and produce paper maps. I'm re-asking this question (it was asked once or twice over a couple of years by other people) because I'm really surprised not to easily find such a thing already (I looked hard).   I have found  - which are good, but only style basic data like roads (and do so simply). I've successfully followed the  for getting OSM data to work with. I've carried out some basic style editing successfully. I realise I could create my own styles for this purpose - but this seems like a very big job. I want a visually pleasing map taking into account most of the data available on OSM (i.e. not just streets, but tracks, paths, rivers, woods, lakes, buildings and so on). I'd have thought that there would be other people out there already doing the same... It seems odd to have to re-invent the wheel when both OSM and QGIS are open source / open data projects. I feel like maybe I've just missed the obvious repository of OSM qml files which resides out there on the internet somewhere if you know where to look.  Additional notes in response to query below...  Ideally I'm looking for a Mapnik style rendering of the OSM data, but any equivalent properly developed and complete style would be good.  At the moment the objective is to use this data to produce paper mapping, but simple use of the mapping as base data on which other geographic data can be displayed also requires a decent rendering. At work I use Ordnance Survey data completely styled to produce a full and very detailed UK map (the point being that I didn't have to design this styling, it came with the data). I realise that other tools exist for paper mapping, but the same issues tend to arise at one stage or another... I'm more or less successful in making the tool work for me in really basic terms, but to get to something visually useful I end up back with me either needing to re-invent a complete rendering style from scratch (beyond my skill), or encountering such a complex set of requirements for database setups or whatever that the process crashes and burns before I get anywhere useful. With a few more years of GIS experience I'll maybe be a database, CartoCSS (or whatever else) wizz... but until then I'm prevented from using the amazing resource that OSM provides by this one barrier.  Update (July 2015): Please note that I'm still looking for information on this, and given that I've just been informed that the question has had 2500 views in the last year clearly others are too.
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I need to create a web map showing many raster layers. I am using mapserver and want to use Openlayers, however I can't find any good tutorial about it. I see a couple of old questions ( and ) saying that there were no good documentation. Have the things changed recently?  I would like to find a tutorial teaching from basics to rather complicated things with good explanations of the code and pictures/examples of the results. For now I managed to do only the simplest web map with my .map file, but I need to customize it (add legends, group layers, add more controls, embedding, etc).