MATLAB® is a high-level language and interactive environment for numerical computation, visualization, and programming.

learn more… | top users | synonyms

1
vote
1answer
240 views

Maintaining spatial integrity of Matlab matrix with missing data

I am working with MODIS Terra imagery (MOD13Q1). I am currently trying to compute the autocorrelation structure of the pixels in an MODIS NDVI raster. The problem is that I have clipped the original ...
1
vote
1answer
167 views

convert XML to PostgreSQL using MATLAB

In a weeks time I should be able to transfer the GIS data provided in the XML format to PostgreSQL database. I have prepared the PostgreSQL database (empty) and looking at Matlab scripts. (I am on ...
1
vote
1answer
3k views

importing shp file in matlab

I have digitize 3 rivers on google earth and converted into shp file to use in matlab. I have checked the shp file in Arcgis and they are working. But while opening in Matlab, matlab shows some error. ...
0
votes
1answer
16 views

How to remove cloudy pixel from MODIS NDVI (MOD13Q1)

I am using MODIS NDVI product (MOD13Q1) for the vegetation changes study. I want to remove cloudy or bad pixel from MODIS NDVI data. I am not getting any suitable method or software or any program to ...
0
votes
1answer
14 views

PSO for solving shortest path in matlab

I crate a file that represents 16000 edges with information of start node, end node and cost in a table. In MATLAB i want to solve shortest path with PSO algorithm. How i can solve it?
0
votes
1answer
26 views

ArcMap highlight features from code

I have a shapefile of lines containing an amount n of elements. I exported these features and analyzed them with another program (Matlab), which provided me as an output a row vector of length n ...
0
votes
1answer
116 views

Connect MATLAB to cartoDB using Database Explorer?

I set up a database on cartoDB. I'm trying to use MATLAB to connect to the database using Database Explorer. I've downloaded the PostgreSQL driver. MATLAB asks for connection Parameters: Server ...
0
votes
1answer
925 views

Trilateration algorithm code issue in Matlab

I am currently using the access point (Routers)as reference nodes and wifi chip(as Unknown tag). So i want to detect the position of unknown tag using 3 wifi access points as my tag can scan the ...
2
votes
0answers
47 views

Hot Spot Map in ArcMap and MATLAB

I've tried out the Hot Spot Map tutorial for ArcMap, which is working just fine, and I'm now starting to make some modifications so that it fits my data sets. Instead of aggregating the points as in ...
2
votes
0answers
56 views

Set NaN values to Transparent in Matlab 'geoshow' function?

I am trying to plot rainfall values in MATLAB using geoshow function. NaN values should be transparent in the map. However, the plot I am getting comes with dark blue color for NaN values. I have ...
2
votes
0answers
33 views

Converting u and v from WGS84 to NZTM2000 - Do I need to do vector conversion?

I have u and v wind component values in latitude and longitude in WGS84. I want to convert this to NZTM2000. I've converted the lat/lon in ArcView - (and will try in R) - but do I need to also do some ...
2
votes
0answers
853 views

How to limit a specific area in order to have a topographic 3D map using MatLab?

I am using MatLab, I want to build a topographic 3D map, I am following this guide, I have been doing the steps listed on the section Draping Geoid Heights over Topography, and I do not have any ...
2
votes
0answers
275 views

Iteration based positioning on Matlab - retrieving coordinates between iterations

This is my first question on SE so let me know if I'm not asking my question in the right place. So basically, I have an algorithm which uses UMTS measurement events for positioning estimation, which ...
2
votes
0answers
235 views

how to convert lat and longitude into distance near poles?

I am trying to convert latitude and longitude into meters in polar regions. I am looking for higher accuracy upto 0.00 meters preferably. I tried the haversine formula but it doesnt seem to be ...
1
vote
0answers
136 views

Creating spatial plot with colored polygons in MATLAB from shapefile?

I have a shapefile of that has 1800+ polygon features. Each polygon has unique value. How to create a spatial map for visual interpretation. Here is what I have tried in MATLAB. clear all; clc; ...
1
vote
0answers
53 views

Georeferenced Image Overlay and export to new image

I have two Geotiffs (one satellite image, one clipped image). I want to put the clipped image over the satellite image, because it shows flow velocity from this shown glacier (see image below). I ...
1
vote
0answers
30 views

To filter the wrong data of point positioning

I have collected GPGGA data by Novatel OEMV receiver in static single point mode. I have so much data (GPGGA format) and I want to get the static point axis by averaging all data. But some of the data ...
1
vote
0answers
63 views

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)....
1
vote
0answers
133 views

Auto generate waypoints for a map

I am working on a project where I need a function which generate way-points considering the obstacle in the area. For example, if a shoreline world-map is given and the requirement is to generate 100 ...
1
vote
0answers
217 views

Retrieving Aerosol Optical Depth (AOT) from Landsat multispectral data

I need to retrieve Aerosol Optical Depth from Landsat multispectral datasets. Has anyone successfully tried something like that before?
1
vote
0answers
425 views

Calculating distance in m in xyz between GPS coordinates that are close together

I have a set of GPS Coordinates and I want to find the speed required for a UAV to travel between them. Doing this by calculating distance in x y z and then dividing by time to travel - m/s. I know ...
1
vote
0answers
151 views

How to represent the time(weekly/monthly) variationof a polygon map using one image?

I have a base map made up of three hundred polygons, Each polygon has lots of attribute values(For example, each week/month get a value). But I only want to draw one picture(due to page limitation) ...
1
vote
0answers
132 views

How do I account for changing latitude with a spatial filter?

I'm working with data in latitude/longitude grid form in a non-GIS specialised package (MATLAB) and wish to apply spatial filters to it. As this data contains a broad range of latitudes and is ...
1
vote
0answers
198 views

Reshape Matrix and perform Zonal Statistics in Matlab

I have 2 grids: 1) n by m - at 100m 2) n*10 by m *10 - at 10m. These grids cover the same area. I have to perform zonal statistics at scale of grid no.2. Cell value of grid no.1 is cumulative for ...
1
vote
0answers
2k views

How to project geographic coordinates (lat/long) to a cartesian system (albers equal-area)?

I am using this matlab package http://www2.ocgy.ubc.ca/~rich/map.html#examples to project the latitudes,longitudes of my data to a specific projection. For this particular case I am using albers ...
0
votes
0answers
14 views

Merging multiple netcfd files into a single file

I have rainfall outputs from a climate model on daily basis for about 90 years. I am looking for ways to merge multiple netcdf files having same variables for different time periods. Such as prec_2011....
0
votes
0answers
36 views

Difference Google map vs shp in Matlab

I am new in GIS however I already has spent a lot of time trying to solve my problem. My final goal is to have a list of maps in shp-standard for simulations. I did the following step: 1. I found a ...
0
votes
0answers
23 views

Evaluating accuracy of registered images

I am performing image registration by extracting SURF features from 2 multi temporal satellite images, in Matlab, as explained here. The steps provided seem to work great for me, and I can visually ...
0
votes
0answers
26 views

Time Difference of Arrival

I am trying to implement indoor positioning system in Matlab. Does any one know any simple method to find the time difference of arrival.I have 6 references and one target.Need to find the time ...
0
votes
0answers
17 views

Arrangement of vectors and matrix in text file?

My ASCII file has a vector of latitudes, and the indices of those latitude values tie latitude values to the data sharing the same index. That is, if given: latitude[x=0,1,2,3] = 10, 20, 30, 40 ...
0
votes
0answers
101 views

Wavelet analyses of ndvi using python or matlab

I want to carry out a wavelet decomposition and regression analyses on my NDVI data to see the relationship with other climatic factors like precipitation, temp. What kind of software is best for this ...
0
votes
0answers
278 views

Matlab code to calculate SEBAL Model

I am working on an article and I want to find a way to calculate SEBAL model.I have find an article(this) with have a matlab toolbox named EVAMAPER but could not find any download link of it, Does ...
0
votes
0answers
92 views

Bi-Weekly NDVI data into monthly Datasets

I have NDVI data in both Ascii Grid format (0.250 degrees resolution) and raster format twice a month like: ndvi1981_07a ndvi1981_07b I would like to combine these bi-weekly values (average) into ...
0
votes
0answers
246 views

Extracting rooftops using MATLAB

I am using Matlab to extract rooftops of buildings and I want an orthoimage i.e. a .jpg file, a world file .jgw and a shape file .shp as input. A mask is needed to "hide" the pixels of the image ...
0
votes
0answers
96 views

'Out of bounds' Error in profile51 function of matlab

I am trying to Extract long profile data in Matlab. I have followed the steps of this pdf. Now, in Matlab I passed the function profile51(‘file_name’, ‘arcmap_directory’, ‘matlab_directory’, ‘n’); ...