geog | Quick and easy geographical functions in Python | Data Manipulation library

 by   jwass Python Version: 0.0.2 License: MIT

kandi X-RAY | geog Summary

kandi X-RAY | geog Summary

geog is a Python library typically used in Utilities, Data Manipulation, Numpy applications. geog has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can install using 'pip install geog' or download it from GitHub, PyPI.

Quick and easy geographical functions in Python
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            kandi-support Support

              geog has a low active ecosystem.
              It has 41 star(s) with 3 fork(s). There are 7 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              geog has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of geog is 0.0.2

            kandi-Quality Quality

              geog has 0 bugs and 2 code smells.

            kandi-Security Security

              geog has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              geog code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              geog is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              geog releases are not available. You will need to build from source code and install.
              Deployable package is available in PyPI.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.
              geog saves you 103 person hours of effort in developing the same functionality from scratch.
              It has 261 lines of code, 18 functions and 8 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed geog and discovered the below as its top functions. This is intended to give you an instant insight into geog implemented functionality, and help decide if they suit your requirements.
            • r Propagates a point at a given position .
            • Return the angle between two points .
            • Distance between two points .
            • Convert shapes to arrays .
            Get all kandi verified functions for this library.

            geog Key Features

            No Key Features are available at this moment for geog.

            geog Examples and Code Snippets

            No Code Snippets are available at this moment for geog.

            Community Discussions

            QUESTION

            PostGIS transforms st_dwithin to && on geography column without preserving the custom spatial reference system
            Asked 2021-Jun-02 at 09:40

            When I use st_dwithin on a geography column with a GIST index, the explain plan shows that the narrowing condition on the index scan is changed into a && condition. With this different condition, the result set is missing rows that are included if a st_dwithin is performed using a full table scan when there is no index.

            The condition in the explain plan without an index is

            ...

            ANSWER

            Answered 2021-Jun-02 at 09:40

            The issue is with _st_expand. This function expands the bounding box of the given geography. Looking at the code, we can see that the desired distance is modified using WGS84 radius, so the custom CRS is indeed ignored. You can report the bug if you wish.

            Source https://stackoverflow.com/questions/67793734

            QUESTION

            Optimizing a postgis query - why is 2nd index not being used?
            Asked 2021-May-24 at 02:10

            We have a table with tens of millions of polygons and we have this index:

            CREATE INDEX IF NOT EXISTS polygons_geog_idx ON polygons USING GIST(geog);

            That let us query the DB really efficiently, like so:

            SELECT * FROM polygons WHERE st_dwithin('SRID=4326;POINT(-1 50)'::geography, geog, 500);

            Now due to the business requirements, we need to return only biggest 200 polygons. Easily doable like with:

            • LIMIT 200
            • ORDER BY st_area(geog)

            Full Query: SELECT gid, st_area(geog) as size FROM polygons WHERE st_dwithin(geog, 'SRID=4326;POINT(-1 50)'::geography, 500) ORDER BY st_area(geog) DESC LIMIT 200.

            Because of the order by and select our query slows down by 10x. I thought it will be easily fixable by adding another index like seen in this SO Answer: CREATE INDEX polygons_geog_area_idx ON polygons (st_area(geog));

            But polygons_geog_area_idx doesn't seem to be picked up:

            ...

            ANSWER

            Answered 2021-May-24 at 02:10

            PostgreSQL cannot combine two indexes in this way, one for the order and one for selectivity.

            In order to sort by the area, it first needs to compute the area. The sort itself is fast (taking only 15% of the time) so it must be the computation of the area which is slow. An EXPLAIN VERBOSE suggests to me that the computation of the area is done as part of the index scan and then the result passed up to the sort, rather than being done in the sort itself. So it makes sense that the timing of doing this would be attributed to the index scan.

            To improve the time needed to compute the area, you could compute and store it as part of the table. The best way to do that (with new enough version) is with a generated column.

            Source https://stackoverflow.com/questions/67664769

            QUESTION

            Yaml/Jinja2/Ansible Processing dict list with jinja template
            Asked 2021-Apr-04 at 14:13

            How to process dict list like below, any method using jinja or ansible filter or any other way is welcome

            From:

            ...

            ANSWER

            Answered 2021-Apr-04 at 14:13

            An easy solution is to pass the text generated by your template through the from_yaml filter. For example, this playbook:

            Source https://stackoverflow.com/questions/66941562

            QUESTION

            How to create a geography and double precision database columns in Rails
            Asked 2021-Jan-10 at 15:33

            I would like to create a table like with this postgresql query. How to made a rails migration with a DOUBLE PRECISION and Geography column ?

            ...

            ANSWER

            Answered 2021-Jan-10 at 15:33

            You can run custom sql in migrations

            Source https://stackoverflow.com/questions/65652610

            QUESTION

            geom_bar and geom_point conditional colours
            Asked 2020-Nov-13 at 07:30

            I have a simple geom_bar and geom_point and would like to colour bars and points based on values in data. My code is currently as follows:

            ...

            ANSWER

            Answered 2020-Nov-13 at 07:30

            This could be achieved like so:

            1. Add new variables with colors to your dataset according your conditions using e.g. dplyr::mutate and dplyr::case_when
            2. Map these new variables on color or fill.
            3. Make use of scale_color/fill_identity

            Source https://stackoverflow.com/questions/64807698

            QUESTION

            Unable to match specific string with regex
            Asked 2020-Nov-03 at 10:39

            I am trying to match html texts converted into strings. But None of my regex is working.

            Html texts I am trying to match from:

            ...

            ANSWER

            Answered 2020-Nov-03 at 06:30

            QUESTION

            Geospatial data in R: I have a matrix of latitudes, a matrix of longitudes, and a matrix of values-how combine?
            Asked 2020-Apr-25 at 00:10

            I have three matrices: the first one is a matrix of longitude points, the second is a matrix of latitude points, and the third is a matrix of air quality values, measured at each latitude and longitude. In R, I would like to combine all of these into a raster. Following the discussion here, and using the madeup data below, I thought I would be able to combine the matrices in this way:

            ...

            ANSWER

            Answered 2020-Apr-24 at 17:37

            I would start with using the dimensions that are provided. Presumably coordinates in a different spatial reference system? Once you have these as a raster, you can use projectRaster to transform to lon/lat.

            If the data are not on a regular grid, treat the data as points. You could do this

            Source https://stackoverflow.com/questions/61404797

            QUESTION

            Intermittent error in PostGIS query via Rails (string interpolation failure?)
            Asked 2020-Apr-14 at 12:24

            I have an intermittent error come up after some deploys of my Rails app.

            This code is running in Sidekiq (5 processes each with 10 threads), which is running in a Docker container. I can have tens of thousands of these jobs queued up at any point.

            ...

            ANSWER

            Answered 2020-Apr-14 at 12:24

            There is no need to convert the geography to a string, and then to read it back as a geography.

            You can try directly

            Source https://stackoverflow.com/questions/61198786

            QUESTION

            writing binary data with tobytes() can not be read with software on Windows
            Asked 2020-Feb-24 at 14:15

            I am trying to write some xyz point data to a .ply file using python.

            I am using this script here which basically writes a pandas DataFrame to a binary format via a recarry and numpy method tobytes():

            ...

            ANSWER

            Answered 2019-Oct-03 at 10:24

            The difference between made_with_code.ply and made_with_windows.ply is that in the latter, all decimals are rounded to 2 decimals as you can see with:

            Source https://stackoverflow.com/questions/58209726

            QUESTION

            How can I do a rails migration and rails seed
            Asked 2020-Jan-22 at 18:04

            I would like to do a rails migration and a rails seed with this postgresql query. How can I do that ?

            ...

            ANSWER

            Answered 2020-Jan-22 at 18:04

            You should be create a rake task ( exp: create grids.rake in your lib/task )

            Source https://stackoverflow.com/questions/59865448

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install geog

            Compute the distance in meters between two locations on the surface of the Earth. geog allows different sizes of inputs conforming to numpy broadcasting rules. Compute the distances from several points to one point. Compute the element-wise distance of several points to several points. geog functions can take numpy arrays as inputs. geog functions can also take Shapely geometries as inputs.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            Install
          • PyPI

            pip install geog

          • CLONE
          • HTTPS

            https://github.com/jwass/geog.git

          • CLI

            gh repo clone jwass/geog

          • sshUrl

            git@github.com:jwass/geog.git

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