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1
vote
1answer
19 views

How to smooth lines in MapServer 5.6.8?

I have a map of property lines in MapServer and the lines look rough and have jagged edges and I wonder if there is anyway to make the lines appear smoother and more rounded in Mapserver 5.6.8? The ...
3
votes
1answer
57 views

How to reproduce Smoothing from Generalizer Plugin in v.generalizer in Processing Toolbar using QGIS?

I´d like to reproduce the smoothing operations done with the Generalizer Plugin inside the v.generalizer Toolbox so I can use them on a polygon layer instead of only on a line layer. I tried ...
1
vote
0answers
36 views

Free implementation of Polynomial Approximation with Exponential Kernel (PAEK) algorithm

I need a Free (i.e. Open Source) implementation of the Polynomial Approximation with Exponential Kernel (PAEK) algorithm, preferably in C, C++, Python, Julia or R. The algorithm is one of the methods ...
1
vote
0answers
11 views

Smooth and boundary clean raster (GRACE) Data

I have some GRACE data that I would like to smooth out and generalize/aggregate the boundaries to look like the maps shown at this website. I've tried playing with filters, converting to integers ...
0
votes
1answer
33 views

smoothing a set point in R

I try to smooth R with a set point as follows: myshp <- shapefile("C:/Users/zina/workspace/Proj_Meteo/interpolate/DZA_adm/DZA_adm0.shp") ...
3
votes
1answer
100 views

problem with polygon smoothing in R

With R I am looking to smooth my Polygon: inter2.csv code: inter1 <- read.table("c:/inter2.csv", header=TRUE) # add a category (required for later rasterizing/polygonizing) inter1 <- ...
1
vote
0answers
50 views

Error with “lowess” function in R

I have a problem with lowess function to smooth NDVI as a time in R. Here is the scripts I run: #Create a time vector to act as x time<-sort(sample(97:297, nlayers(ndvi2000crop1))) ...
-1
votes
2answers
52 views

Using floating point raster image for majority filter in ArcGIS?

I'm trying to do filter images using Majority filter in ArcGIS. My input images is a float point raster image in .img format. There is an error saying "Invalid parameters". What does it mean?
1
vote
0answers
128 views

How do I smooth edges of polygons in QGIS?

Is there a built in function or plugin I can use to achieve smooth lines for my polygons instead of the blocky ones I have now?
3
votes
2answers
184 views

How to generate Non-smooth/crude Contour Lines in QGIS?

I have an SRTM DEM and I want contour lines generated for specific elevations. This can easily be done using r.contour.level/step etc. but the contours generated are smooth and cover the cells only ...
1
vote
1answer
108 views

Raster Smoothing python [duplicate]

I want to perform raster smoothing on a DEM file. I want to to assign the elevation of each pixel using the average elevations of its 8 neighbors. The ESRI's "Python scripting for ArcGIS" has a ...
1
vote
0answers
215 views

Smoothing Lines in PostGIS

I want to smooth Lines in postgis, to be more specific, I want to smooth road data from OpenStreetMap. Basicly I thought of something like this scenario. This would be a possible road segment. I ...
2
votes
0answers
296 views

Smooth, not simplify, lines features in PostGIS

I'm trying to automatically generate paths to place labels on that follow the shape of rivers, 4wd tracks and other very windy lines. At first I thought the st_simplify() function was the answer, but ...
1
vote
0answers
109 views

Literature on the appoximation of trajectory points with (smooth) curves

We are gathering trajectories of GPS points of moving objects (cars, bikes, etc.) and would like to compute approximate curves (that may self-intersect) that would represent those clouds of points. ...
4
votes
0answers
173 views

How to build Poisson autoregression model

I have a SpatialPolygonsDataFrame object in R with about 3000 polygons and associated data. I have columns of expected and observed cases. For the moment, I don't have any covariates. I'd like to ...
6
votes
1answer
209 views

Raster smoothing

I am an italian student. I'm using ArcMap 10. For my thesis I need to simulate a debris avalanche, but in my elevation raster the avalanche deposit is included so I'd need to take it off to simulate ...
0
votes
1answer
69 views

How to smooth XY Co-ordinates of linear feature?

I need to smooth xy co-ordinates. see the image: In this case, i need to remove 5,6,7,8 and 9th co-ordinates or need to make those co-ordinates as a straight line between 4th and 5th. is there any ...
1
vote
1answer
503 views

From a trajectory of GPS points to a multiline segment

Given a trajectory as a sequence of GPS points I would like to create a smooth linestring representing a path where a car drove. The data is stored in postgresql: the input trajectory in a table, ...
3
votes
2answers
717 views

How to perform SIA or Bezier line smoothing in PostGIS?

Can anyone provide an example SQL for smoothing linestrings from postgis table using Bezier curves or Iterative Averaging (SIA) algorithm?
0
votes
0answers
46 views

QGis Smooth Raster DEM [duplicate]

Possible Duplicate: Raster generalization - buffers in rasters, expand pixels? I have a 1m LIDAR DEM which I'm manipulating in QGIS. I'd like to smooth the DEM, such as by having each ...
3
votes
1answer
334 views

Vector to Raster for Smoothing purposes

I have a vector file that represents transit scores by CT of a city. It shows harsh boundaries where one CT has great access to transit and right beside that CT is one that has extremely poor access. ...
8
votes
3answers
5k views

How to smooth/generalize a polygon in qgis

Is it possible to smooth or generalize a polygon in qgis? Ìs there a plugin available like the generalizer-plugin for lines? I could convert my polygons to lines, smooth them and convert them back to ...
35
votes
1answer
4k views

How to smooth the polygons in a contour map

Here is a contour map for which all the polygons of levels are available. Let ask how to smooth the polygons keeping all vertices preserved in their exact locations? Indeed the contour is made on ...