geojson

I'm new to D3js and GeoJSON and would like to know how can I can render my polygons from GeoJSON file. My GeoJSON file comes from ESRI Shapefile without prj File, so I have no Information about the projection but its definitely not WGS 84. With an third party tool I can convert my GeoJSON to SVG and the format looks like this: (I have more then 65000 paths.) <path style="fill=blue;stroke-width:0.035;stroke-linecap:round;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M 297.378906 316.671875 L 298.539063 316.628906 " transform="matrix(1,0,0,-1,0,842)"/>

So I wanted to do some experiments with location data in mongodb, so I wrote some python code to generate some testing data. Unfortunately the documentation at http://docs.mongoengine.org/apireference.html#mongoengine.fields.PointField isn't explicit about how to format the input. class Location(db.Document): coord = db.PointField(required=True) # GeoJSON Trying to store a list containing the lng/lat fails: >>> a = Location(coord=[1,2]) >>> a.save() mongoengine.errors.OperationError: Could not save document (location object expected, location array not in correct format) Passing a geoJSON

I'm trying to read in a json file which contains polylines into R for plotting in leaflet or ggmap. The file is in the geojson format. The file can be found at: http://datasets.antwerpen.be/v4/gis/statistischesector.json I've tried: library(rgdal) library(jsonlite) library(leaflet) geojson <- readLines("statistischesector.json", warn = FALSE) %>% paste(collapse = "\n") %>% fromJSON(simplifyVector = FALSE) This actually reads in the file but it seems to be in a wrong format for further processing. Alternatively: readOGR(dsn="~/statistischesector.json", layer="OGRGeoJSON") Returns: Error in

当我们谈论一些GIS API时，首先想到的是渲染高级地图文件。近期，慧都推出了一款能够读取，编写和转换最流行的GIS文件格式，例如ESRI Shapefile和GeoJSON，而无需任何其他软件的API控件——Aspose.GIS（ 点击下载 ）。 那么，你知道Aspose.GIS同样拥有强大的地图渲染功能吗？下面我们用示例来介绍如何使用这项功能。 Aspose.GIS提供了此功能以将Shapefile，FileGDB，GeoJSON，KML或其他受支持的文件格式渲染为SVG。为了简化和快速生成结果而无需设置大量属性，可以使用很少的代码行来渲染地图。 using (var map = new Map(800, 400)) { map.Add(VectorLayer.Open(dataDir + "land.shp", Drivers.Shapefile)); map.Render(dataDir + "land_out.svg", Renderers.Svg); } 只需设置最终的图像分辨率，然后根据输入文件类型选择驱动程序，即可了解它的简单性。该地图已准备好呈现为SVG。这是程序的输出： 同样，可以自定义渲染和功能样式，以获得所需的外观。这是高级示例代码，演示了此新版本中的更多功能。 using (var map = new Map(800, 476)) { var

I am trying to build a GeoJSON object from a SQL query to some GIS point data in a postgis postgresql database. A snippet of my node.js app.js is below. As it stands I understand building the type and features, but don't know how to attach a properties array to each GeoJSON record (in the below, it all renders at the end, separate from (not collated with) the features). THE QUESTION: What do I need to do so that the properties attach (collate) for each record in the loop that builds the GeoJSON So that it looks more like this http://www.geojson.org/geojson-spec.html#examples ? `function

I have laravel outputting the following: [ { "id": 3, "lat": "38.8978378", "lon": "-77.0365123" }, { "id": 4, "lat": "44.8", "lon": "1.7" }, { "id": 22, "lat": "37.59046", "lon": "-122.348994" } ] i would like it to be the geoJson format: { "type": "FeatureCollection", "features": [ { "type": "Feature", "geometry": {"type": "Point", "coordinates": [lat, lon]}, "properties": { "name": "value" } } ] } I know i need some sort of loop. But i'm not sure how to structure it in PHP. Any guidance would be greatly appreciated. Trying to build a map application that could have several thousand markers