geodesy | Libraries of geodesy functions implemented in JavaScript | Map library
kandi X-RAY | geodesy Summary
kandi X-RAY | geodesy Summary
[documentation] these libraries started life (a long time ago) as simple ‘latitude/longitude’ code fragments covering distances and bearings, intended to help people who had little experience of geodesy, and perhaps limited programming experience. the intention was to have clear, simple illustrative code samples which could be adapted and re-used in other projects (whether those be coded in javascript, java, c++, excel vba, or anything else…). with its untyped c-style syntax, javascript reads remarkably close to pseudo-code, exposing the algorithms with a minimum of syntactic distractions. while still valid for that purpose, they have grown since then into considerable libraries, based around: - simpler trig-based functions (distance, bearing, etc) based on a spherical earth model - more sophisticated trig-based functions (distance, bearing, etc) based on a more accurate ellipsoidal earth model - vector-based functions mostly based on a spherical earth model, with some ellipsoidal functions. complementing these are various mapping-related functions covering: - utm coordinates & mgrs grid references - uk ordnance survey (osgb) national grid references. and also functions for historical datum conversions (such as between nad83, osgb36, irl1975, etc) and modern reference frame conversions (such as itrf2014, etrf2000, gda94, etc), and conversions between geodetic (latitude/longitude) coordinates and geocentric cartesian (x/y/z)
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- Checks whether a point is inside of a polygon .
- Get class information
- reverse the reverse transformation
geodesy Key Features
geodesy Examples and Code Snippets
Lines of Code : 75License : Permissive (MIT License)
Copydef lamberts_ellipsoidal_distance(
lat1: float, lon1: float, lat2: float, lon2: float
) -> float:
"""
Calculate the shortest distance along the surface of an ellipsoid between
two points on the surface of earth given longitudes an // after recieve route response
var route = result.response.route[0];
var path = route.shape;
var path_= [];
// Transform original path to an array of H.geo.Point
// TODO: create a simplified path for better perfomance
path.forEach(functCommunity Discussions
Trending Discussions on geodesy
QUESTION
I am working with a large amount of CityGML 3d building data (LoD2) and imported the data using the 3D City Database (and its Importer/Exporter tool) (see https://www.3dcitydb.org/3dcitydb/) which creates a new schema in the database and uses java routines to translate the XML-style geodata to PostGIS compatible database input.
The information (spatial and non spatial) for each building is then written to different tables, where "building" table holds building meta data such as building function or street name and "surface_geometry" table holds solid and 3d surface geometries of all buildings. With columns "id", "parent_id" and "root_id" used as PKs and FKs to ensure the elements of one table can be matched to one or more elements of the other table.
Since I need 2d building footprints (or bird view polygones) for most of my analyses, I created queries to make surfaces 2d with st_force2d() before st_union()ing all 2d surface of the same building with group by on the available FK.
Are there any ideas how to improve the following code to effiecntly process a huge dataset?
The queries are
...ANSWER
Answered 2021-Dec-30 at 14:40Got an answer from the developers directly on Github: https://github.com/3dcitydb/3dcitydb/issues/73
QUESTION
For a project I wanted to extend Elasticsearch and therefore need to use the package Symja. In the Github for Symja, there is a manual for the usage with Maven provided.
Since the Elasticsearch repository is build with Gradle, I also need to use Gradle instead of Maven. Testing the suggested example Symja project, the following build.gradle (which I basically generated by using gradle init and adjusted a little) imports the library flawlessly:
ANSWER
Answered 2021-Apr-29 at 17:51For the sake of completeness, I want to subsume at least the part of the solutions given by @axelclk and @IanGabes that worked. First of all, it seemed to be necessary to manually add all implicit dependencies plus the repositories they originate from to server's build.gradle, corresponding to the pom.xml files of matheclipse-core and of matheclipse-external:
QUESTION
I am getting a huge list of error when I try to run the following code with google_maps_place_picker package in flutter.
ANSWER
Answered 2021-Apr-17 at 14:08You are using import 'package:google_maps/google_maps.dart';
google_maps package only supports web. For mobile support should try out flutter_google_places, google_maps_flutter or any other package.
QUESTION
I've created a Vue 2 project with vue-cli and tried to run npm update.
Unfortunately, I receive the following error:
ANSWER
Answered 2021-Mar-06 at 13:39maybe you can try to npm i -g npm-check-updates then in the root folder try to execute ncu -u this will update your dependencies, devDependencies and peerDependencies
QUESTION
I am trying to create a program in Python that will let me check the Geodetic Transformations that the geodesy app in my survey software spits out. I have a test point and know that my program currently returns total rubbish.
The formula that I am using is the 7 Parameter Halmert Transformation:
Vb = T + (1 + s * 10^−6)•R•Va
My code is:
...ANSWER
Answered 2020-Jul-07 at 07:26The Helmert transformation is for mapping a point in cartesian (ECEF, aka earth centred earth fixed) coordinates relative to one coordinate system, to the cartesian coordinates relative to another coordinate system.
If you want to transform lat,long,height coordinates relative to the first coordinate system to lat,long,height coordinates relative to a second, the drill is:
QUESTION
Disclaimer: I have only started using sf so I might be (hopefully!) missing something obvious here.
I have the AusGeoid2020 data which consists of 15,454,800 points and some attributes to convert between ellipsoidal heights (i.e. GPS height) and the AHD.
Although the file is large (914Mb) it's easy enough to read in:
...ANSWER
Answered 2020-Jun-05 at 05:28We can use st_as_sf as follows. The default setting would remove the columns with coordinate information (in this case, Longitude and Latitude). If you want to keep those columns, set remove = FALSE.
QUESTION
I've inherited a legacy Java app require JDK 7.
The app will compile, but I'm getting runtime errors which look like Hibernate entityManagerFactory issues.
The strange part is this app works on another developers machine. He even sent me his Tomcat directory, I have tried it on a Mac and on an Ubuntu machine. No matter where I run it, the runtime errors persist.
I think the problems is an init method in entityManagerFactory class,
...ANSWER
Answered 2020-Feb-14 at 20:04You have a nested NullPointerException in what looks like your PersistenceConfiguration class
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