Npm convert shapefile

Notice to SHP format - do not forgot to upload also associated. Please make sure that coordinate reference system of your input dataset is assigned correctly - otherwise the resulting KML file may be spatially shifted or wrong. If the coordinate system of your input data is not present or not recognized correctly, it is posible to assign the correct one.

Then it is possible to transform your data to any other coordinate reference system. If the input format is directory-based, it is necessary to pack whole directory - not only the content. To avoid considerable servers loads we had to set conversions limits for each user - please see Free plan.

npm convert shapefile

If you exceeded the limit, you may register a prepaid plan - otherwise you will be charged by credit card during the conversion process. Your charges allows us to cover costs associated with the servers operation and to improve our service. Or browse files to convert. Close Continue. Importing input data Try to convert data directly from OpenStreetMap database No, thanks.For a live example, see bl. See Command-Line Cartography for a longer introduction. Caveat emptor: this is a work in progress and does not currently support all shapefile geometry types.

npm convert shapefile

Please contribute if you want to help! See text-encoding for a browser polyfill. The meaning of the arguments is the same as shapefile. The yielded collection has a bbox property representing the bounding box of all records in this shapefile.

The bounding box is specified as [ xminyminxmaxymax ], where x and y represent longitude and latitude in spherical coordinates. The coordinate reference system of the feature collection is not specified.

This library does not support parsing coordinate reference system specifications. If shp instanceof ArrayBuffer or shp instanceof Uint8Array, reads the specified in-memory shapefile. Otherwise, shp must be a Node readable stream in Node or a WhatWG standard readable stream in browsers.

Otherwise, dbf must be a Node readable stream in Node or a WhatWG standard readable stream in browsers. See path-source for more. Unlike shapefile. Subsequent calls to source. In Node, the files are read from the file system ; in browsers, the files are read using streaming fetchif available, and falling back to XMLHttpRequest.

If dbf instanceof ArrayBuffer or dbf instanceof Uint8Array, reads the specified in-memory shapefile. Calling shapefile. Similarly, shapefile. This field is only defined on sources returned by shapefile. Returns a Promise for the next record from the underlying stream. The yielded result is an object with the following properties:.

If file is not specified, defaults to reading from stdin with no dBASE file. For example, to convert to a feature collection:. When --geometry or --ignore-properties is not used, the shapefile is joined to the dBASE table file.

Output newline-delimited JSONwith one feature or geometry per line. Output a geometry collection instead of a feature collection or, in conjuction with --newline-delimitedgeometries instead of feature objects. Implies --ignore-properties. Ignore the corresponding dBASE table file. Output features will have an empty properties object. Specify the coordinate reference system name. This only applies when generating a feature collection; it is ignored when -n or -g is used.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am trying to convert the Ghana admin1 shapefile that can be found here. I have used this command on a Linux machine:. Use topojson command lineit's more direct. If you want to keep all properties :. For GHA, there is no attribute in the. Inspecting your json will give you clues of what data is available, and where dot notation path.

The topojson distillery help to preview any topojson and if the code is correct. A correct autofocus will need a small bit of code from Mike Bostocksexample here :. EDIT: Should work now. Live demo: bl. Perhaps you're running an outdated version of GDAL?

You can check your version by using: ogr2ogr --version.

Combine Excel Files in Folder into One Worksheet Using JavaScript & NodeJS

Learn more. Shapefile to Topojson conversion Ask Question. Asked 5 years, 1 month ago. Active 5 years ago. Viewed 4k times. I am I doing something wrong? Should I install other "drivers"? But how? GPierre GPierre 7 7 silver badges 20 20 bronze badges. Do you use nodejs, npm? If so, you can use topojson npm package to convert shp into topojson.

Indeed Hugolpz. In the question linked above, the person first convert its file to GeoJson before going to the TopoJson. And I believe I do use the topojson package.

If your aim is to convert to topojson, you use topojson command line tool anyway. If you don't need any advanced functions reprojection, clipping, etcsbetter to directly convert from shp to topojson. Active Oldest Votes. Or via terminal replace New Ghana code GHA by your target country's iso code : prepare folder mkdir -p. Hugolpz Hugolpz This is very helpful. I used the second command you posted to convert from. However, I can't have the html to work.

Working with Shapefiles

I used your code and adjusted the url's.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again.

If nothing happens, download the GitHub extension for Visual Studio and try again. For a live example, see bl. See Command-Line Cartography for a longer introduction. Caveat emptor: this is a work in progress and does not currently support all shapefile geometry types. Please contribute if you want to help! See text-encoding for a browser polyfill. The meaning of the arguments is the same as shapefile. The yielded collection has a bbox property representing the bounding box of all records in this shapefile.

The bounding box is specified as [ xminyminxmaxymax ], where x and y represent longitude and latitude in spherical coordinates.

The coordinate reference system of the feature collection is not specified. This library does not support parsing coordinate reference system specifications.

If shp instanceof ArrayBuffer or shp instanceof Uint8Array, reads the specified in-memory shapefile. Otherwise, shp must be a Node readable stream in Node or a WhatWG standard readable stream in browsers. Otherwise, dbf must be a Node readable stream in Node or a WhatWG standard readable stream in browsers. See path-source for more. Unlike shapefile. Subsequent calls to source. In Node, the files are read from the file system ; in browsers, the files are read using streaming fetchif available, and falling back to XMLHttpRequest.

If dbf instanceof ArrayBuffer or dbf instanceof Uint8Array, reads the specified in-memory shapefile.

Convert Shapefile to TopoJSON file

Calling shapefile. Similarly, shapefile. This field is only defined on sources returned by shapefile. Returns a Promise for the next record from the underlying stream. The yielded result is an object with the following properties:. If file is not specified, defaults to reading from stdin with no dBASE file. For example, to convert to a feature collection:. When --geometry or --ignore-properties is not used, the shapefile is joined to the dBASE table file.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. If you are having encoding issues in internet explorer please include this script as well.

Redoing all of this in modern JS. Promises, Typed Arrays, other hipster things, I wouldn't say it's based on RandomEtc's version as much as inspired by it as there is 0 code shared and I really only read the binary ajax part of his hence why my function has the same name, they are otherwise not related.

My sources were:. For use with browserifywebpack :. Has a function shp which accepts a string which is the path the she shapefile minus the extension and returns a promise which resolves into geojson. If there is only one shp in the zipefile it returns geojson, if there are multiple then it will be an array. All of the geojson objects have an extra key fileName the value of which is the name of the shapefile minus the extension I. I used my library catiline to parallelize the demos to do so I changed.

Main library MIT license, original version was less permissive but there is 0 code shared. Included libraries are under their respective lisenses which are:. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Sign up. Not many caveats. JavaScript Branch: gh-pages. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit Fetching latest commit…. You signed in with another tab or window.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. I now want to do the same with a UK local authority shapefile which I have read into a couple of different programs and which doesn't make any sense to me. I presume I need to convert the shapefile to the same notation system but I don't understand the format it is currently in. Unfortunately trying to convert the shapefile in ARC Tools gives an erro. You don't need to have coordinates in the attribute table for the shapefile to be usable. In fact, sometimes you don't want coordinates as attributes because you would need to continually recalculate them if you're doing a any geometric editing of the shapefile.

Does the shapefile have a defined coordinate system?

npm convert shapefile

Check its property page. Set the data frame to BNG. Does the local authority data line up? If it does, define its coordinate system as British National Grid.

Create two new fields called x and y, or something of the like. Then, right click in those fields in the attribute table, choose Calculate Geometry, and then the appropriate coordinate type x or y for each field.

That will explicitly record into the attribute table the coordinates for each point in whatever spatial reference system the data is in. Sign up to join this community.

The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Converting shapefile coordinates? Ask Question.Shapefiles are a proprietary but common geospatial file format developed by ESRI. It is frequently used by governments to store geospatial data. In this tutorial, we'll cover what you need to do to successfully import shapefiles, along with special steps using other open source tools for those trickier ones.

Shapefiles on the internet are usually zipped, but once uncompressed you will see a number of files with the same name but different extensions. Some of the more important ones are:.

If it is missing, no attributes of the geometries will be imported. Note that you can use -a to select attributes of features to convert into tags, which will let you filter features server-side when you access the XYZ Hub API. Shapefiles are an infinitely variable format, and there will be cases where you may need to manipulate or modify the data in order to import it into your XYZ space.

You can do this with other open-source geospatial tools, specifically mapshaper and QGIS. The mapshaper documentation provides a wide variety of options, but a simple conversion command is:. You can use -s to stream the file and upload it much more quickly, but in this case you will need to specify the property keys with -p. If you see unusual errors when piping from mapshaper to XYZ, you may have more success keeping the conversion and uploading as separate steps.

Note that you can also run mapshaper as a web app, though there may be limits on file sizes. The plugin is also available on Github.

Convert SHP to KML Online

Some shapefiles may contain very large and extremely detailed individual lines or polygons. Coastlines are a common example. If a single feature is greater than MB, you may see or http errors when you try to upload the shapefile. In many cases, this level of detail is unnecessary for web mapping. If so, you can try to simplify the feature using mapshaper or QGIS. There are typically features per chunk. While a large feature may be small enough to be uploaded, when combined with other features, the chunk may be too large for the API.

Depending on the size of the feature, you may want to try c ten per request or even c -1 which would load one feature at a time.

Note that the Simplify tool works in decimal degrees, and the default is 1 degree, which is probably not what you want. Useful values depend on the extent and zoom levels of your map, but 0. This will generally work for shapefiles up to MB, but you will start to see Node.

Convert SHP to GeoJSON Online

Note that -a is not available when -s is used, but you can still specify properties to convert into tags using -p. Just like standards, the beauty of projections is there are so many to choose from. The CLI will inspect the. If it is an uncommon projection, you may see errors, but it is easy to get mapshaper to try to convert into GeoJSON-friendly coordinates.

As of version 1.


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