Questions tagged [mathematics]
The abstract study of topics encompassing quantity, structure, space, change, and other properties
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questions with no upvoted or accepted answers
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Projection: Mollweide to Equirectangular
I am trying to reproduce in Python a coordinate transformation of a map from Mollweide coordinates (see Figure A) to Equirectangular coordinates (see Figure B) that I saw done in Mathematica in the ...
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1
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Math formula to calculate GPS location for weighted GPS data points
I'm working to improve the location and accuracy of a map / data-point driven application.
I have a collection of locations of interest. Each location of interest has a collection of data points that ...
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Finding Intersection of Two Circle given Lat/Lon and radius?
I am attempting to calculate the intersection of two circle on the Earth with a given latitude, longitude and radius. I started with this Calculating intersection of two Circles?
These circles will ...
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Dividing polygon into tiny polygons of particular size
I would like to divide/cut an irregular polygon into tiny polygons of a particular size(1.6m x 1m) in such a way that most of the irregular polygon area has to be utilized (an OPTIMIZATION MODEL)
The ...
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Calculate lat/long as percentage distance between two points (MSSQL)
I've loaded the US road shapes into MSSQL. I've determined the query to locate the segment of road for a specific address. The segment contains a "linestring" from a series of points.
I'm trying to ...
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calculate turning acceleration from a compass
I have degree and timestamp and want to calculate the turning acceleration. What to trigger if the compass is turning fast.
Is there a mathematic way to get an acceleration parameter?
3
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How to locate a house on the 3D Map correctly?
I've done my 3D map generation in WebGL/THREE.JS project and have an issue with the building locations.
I have the data about building position ( its polygon ) from DB server, but first of all I want ...
user22170
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Calculating Center (GPS Point) and Radius (km) of n GPS points
I'm new to GPS and position mapping but i have a background in programing and some of the math related to it.
I've been tasked with writing a small golang program that takes n GPS points (DMS) and ...
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calculating HRMS using NMEA sentences including GPGGA , GPGSV, GLGSV, QZGSV,QZGSA, GPGSA?
I have NMEA sentences including GPGGA , GPGSV, GLGSV, QZGSV,QZGSA, GPGSA and GNGSA. my goal is to achieve HRMS accuracy meter. produced android devices for special intent gives GP/GN GST nmea message ...
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How to compare centrality of points in different shaped and sized polygons
Suppose I have several polygons of varying shape and size, each containing a single point. I want to compare the centrality of each point, and determine which point is more central to its polygon. I'm ...
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Finding the Point of Intersection Between Two Line Segments and Level of Error
I am working on calculating the intersection of two lines. Each line segment is represented as two geographic coordinate pairs. Additionally, each line segment is less than 1km in distance.
My ...
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In Tile coordinates, how to get one zoom-level deeper but span the same area?
For an arbitrary tile region defined by (z1, x1, y1), how can we increase z1 to z1 + 1 but span the exact area defined by (z1, x1, y1)?
For example, consider t1=(2,2,1). If we want zoom=3 for the same ...
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Determine if a great circle is on the left or right from a point defined by latitude, longitude and bearing
Given
A point coordinate on the map specified by latitude and longitude. Shown as "C" on pictures below.
Direction where this point is moving, specified by bearing in degrees (0-359), where ...
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Converting latitude/longitude into a slab number (or item number) and vice versa?
Purpose: To compress the data transmission for the longitude and the latitude. Initially these datas are in the form DD.MM.mmmm: degrees, minutes, ten thousandths of a minute. Latitude stands under 28 ...
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GRASS GIS: Getting know about stream power index (SPI) computation by r.watershed function
I need to know exact way how stream power index (SPI) is computed by module r.watershed. On the help page is that SPI is α * tan(β), where:
α is cumulative upslope area draining through a point per ...
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How do I compute uncertainties in the positions transformed using Helmert transformation?
I am familiar with Python, MATLAB and Mathematica. My data is given by Cartesian coordinates (positions in X,Y,Z (meters), standard deviations XX, YY, ZZ (meters) and a correlation matrix (XY, YZ, ZX)....
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How to organize/cluster nodes moving on the same direction
The Problem
I am working on a problem of clustering for mobile nodes.
Initially, I though of clustering the nodes based on their angle of movement (relative to the x-axis). However this situation ...
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Trilateration issue
My program isn't making use of any geographical data, but I'm hoping that the users experience in the subject can help me with my current issue.
The project I am working is trying to locate a user in ...
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1
vote
1
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What's the math behind moving from a starting point in the direction of another one?
I am working with decimal-degree coordinates for a software and lack geographic background.
I want to convert the coordinates to a grid to calculate distances and then move around using standard ...
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Adjusting GPS location of an object (sled) pulled at a set distance as it moves 3D
A bit of an odd question.
We're pulling a sled behind a truck which carries an instrument. We've had to mount the GPS on the truck and are pulling the instrument back and forth in lines in a field. We ...
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Calculate point line distance for a geolocation with altitude
I'm trying to calculate the coordinates (Latitude, Longitude, Altitude) of a point on a line at the minimum distance with another point.
I was able to calculate the distance using the formula here:
...
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1
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Load Leaflet ImageOverlay with center point instead of corners
I have an image file that I am able to overlay perfectly fine onto my Leaflet map with this code:
var initLat = 38.9761;
var initLon = -77.4875;
var imageUrl = '/weather/nexrad/radar.png';
var ...
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Clockwise sorting segments of a polygons
My polygons are divised into an array of lines features. Each segments have only 2 coordinates. I would like to sort those segments clockwise starting from the top-right (north-east) like in the image ...
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Band ratio with Euler's number in Google Earth Engine
I've band ratio with exponential equation and Euler's number
band_ratio = (0,0039e)^(2,4952*(B2/B4))
Can anyone write it in Google Earth Engine format?
Or just input the Euler's number?
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How can you completely cover the surface of a raster with circles where the radius of the circle is the raster value at its centroid?
This is more of an algorithmic/math problem, but I was wondering if someone could point me in the right direction. There's the common problem of covering a surface with circles of equal sizes, but ...
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