![]() (This requires figuring out which holes apply to which positive subpaths. Treat with multiple positive subpaths as a MultiPolygon.Currently items within a group are flattened as individual Feature items in the GeoJSON. Treat as MultiPolygon, Geometr圜ollection, or MultiLineString as appropriate.Add more command-line options to control JSON formatting.Support non-rectangular, inverse bilinear unmappings.Ensure that the positive subpath is the first subpath in a.To make it easier for the code to detect which subpath is the 'positive' subpath you must currently: GeoJSON only allows a Polygon to have a single 'positive' subpath (and an arbitrary number of additional 'hole' subpaths). In SVG these subpaths may be oriented clockwise or counter-clockwise, and added in any order. SVG allows elements with an arbitrary number of overlapping subpaths, with some of them being 'positive' space and some 'negative' space. See the output of svg2geojson -help for the options you can pass to the functions, and their default values. But I’ll talk about this in another post.Const ) ![]() I just need a few lines of code to get the result that interests me.Īfter creating the SVG file all that remains is to use it in an HTML page. I modified the elrumordelaluz/scale-that-svg repository. To solve this problem I have to scale the whole file. The labels are disproportionate to the boundaries of the zones. This method works quite well but has a problem: the resulting SVG file is often very small. I can use this file whenever I need to retrieve the position of the labels to insert them into the SVG file Scale the SVG map I can save this information in a GeoJSON file: Of course, it is not necessary to create a temporary variable each time to be used to calculate the position of the labels. Save the result to disk so you can open it with Inkscape: Use a GeoJSON file with indicated the points where to insert the labels Then a function that transforms the array:įinally I create a parseSVG_poi function to get the complete svg: I need a function that allows me to convert a point to text, and decide which text to use: So I convert this GeoJSON into an array of SVG element strings: To create the actual SVG file, however, I have to work with this array. Then I convert this GeoJSON to an array of SVG element strings: So I save the various points in GeoJSON format: There are various algorithms that allow you to do this but the most useful one is called polylabel (it is used to identify the Pole of inaccessibility of each area). To add a label to the various parts of the map I must first locate the center point of each element. I create the attributes variable specifically for this purpose.Īfter getting svgStr I can merge the various elements of the array so that I can get a string to use to create the SVG file.įinally I just have to save the file to disk Add labels to an svg file To keep track of the various data I need a list of the attributes to preserve. I then use geojson2svg to get an array of paths. Obviously I need a starting GeoJSON file, to read and then to convert to JSON:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |