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Devinya Herath
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Professional Interests: GIS
Statistics
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Question
Latitude Longitude to State Plane Coordinate System
I have a set of geographic points expressed in latitude, longitude format. I want to convert these coordinates to state plane co...
13 years ago | 0 answers | 0
0
answersQuestion
Longitude latitude to X-Y plane
I have a set of latitude, longitude pairs obtained using a GPS receiver. The readings correspond to WGS84. I want to convert the...
13 years ago | 1 answer | 0
1
answerQuestion
Visualizing Dense Areas in cartesian plane
I have a table that contains x, y coordinates (cartesian)of a large number of points. X coordinates are stored in a column calle...
13 years ago | 1 answer | 0
1
answerQuestion
Kernel Density for 2D data
I have two series of data(both of type double). I want to generate a kernel density plot from these. Pls help. My coding is give...
13 years ago | 2 answers | 0
2
answersQuestion
2D histogram and/or 2D Kernel Density
I have two series of data (of type double). I want to create a 2D histogram plot and a 2D kernel density estimate plot. Please h...
13 years ago | 1 answer | 0
1
answerQuestion
Mean Kernel Density
Please let me know how to calculate the mean value of a kernel density. For example, if I construct the kernel density plot for ...
13 years ago | 0 answers | 0
0
answersQuestion
'width' parameter in kdensity function
Can somebody plase explain me how to use the 'width' paramater of the kdensity function
13 years ago | 1 answer | 0
1
answerQuestion
??? Index exceeds matrix dimensions.
I have a postgres table that contains 576078 records. I want to access the record with the primary key of '344149'. The primary ...
13 years ago | 1 answer | 0
1
answerQuestion
Line and a Line segment intersection
Does anybody know how to check whether a given *line* (y=mx+c) intersects with a *line segment* denoted by end points P1 (x1, y1...
13 years ago | 1 answer | 0
1
answerQuestion
Distance along the perpendicular line
I have two line segments seg1 and seg2. The starting and ending points of each line segment is known. For example seg1=(x1,y1),(...
13 years ago | 0 answers | 0
0
answersQuestion
Retrieve Double precision Values from a database
I have a database table that contains a two columns (X and Y) of double precision data. I wanted to retrieve these data to Matla...
13 years ago | 1 answer | 0
1
answerQuestion
Export mapstruct to KML
I have a mapstruct that contains two points. I want to view these two points in google earth/ For that, I want to export this ma...
13 years ago | 1 answer | 0
1
answerQuestion
PostgreSQL/PostGIS data to Matlab - How to display
I have successfully connected to a postgreSQL database from matlab and importad a field that contains geometric data (postgreSQL...
13 years ago | 1 answer | 0
1
answerQuestion
Convert to an X Y coordinate System
I have seen that geographical coordinates in (latitude, longitude) format can be converted to XY coordinates using Mathlab equal...
13 years ago | 2 answers | 0
2
answersQuestion
Displaying Latitude Longitude Data
I have a collection of GPS (longitude and Latitude) points collected by a set of GPS receivers. They are stored in a PostgreSQL ...
13 years ago | 1 answer | 0
1
answerQuestion
Can I query a PostgreSQL/PostGIS database from MATLAB?
Is there any way to query a PostgreSQL database table from MATLAB?
13 years ago | 1 answer | 0
1
answerQuestion
Vector Defined by Two Points
I have two points P1(x1, y1) and P2(x2, y2). These are cartesian coordinates. How to calculate the vector P1P2 in matlab?
13 years ago | 2 answers | 0
2
answersQuestion
Vector Calculations on Geographic Data
I have four geographical points: P1, P2, P3 and P4. The coordinates (latitude & longitude pairs) of these points are available. ...
13 years ago | 1 answer | 0