Raster is a data format consisting of regular grids of values, usually stored in an image-like format.

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Fill NoData raster cells with floating point value of closest cell

I am working in ArcMap 10.3.1 with Spatial Analyst tools. I have a raster with some large contiguous areas with NoData. I want to assign the floating point value of the closest cell to each NoData ...
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1answer
21 views

Extract rasterlayer from extent class

I used extract() function to get remote sensing image cell value.The same code to process tif file produce error message. Code as follows: r1 <- raster("2000_2605_1.1_km_monthly_NDVI.tif") ...
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1answer
27 views

Proper approach to a DSM using LAS Dataset to Raster?

I am using ArcGIS 10.2.2, and I am trying to create a DSM out of some LIDAR data. After checking the LAS Dataset properties, I see that I have an average point spacing of approx 0.3. I tried ...
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12 views

Converting raster data from netcdf to image

I'm rasterizing some wind data from oos.soest.hawaii.edu/erddap/griddap/NCEP_Global_Best to use as an overlay of a final image, but I'm having issues calculating the bounding box of the final image. ...
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1answer
23 views

Combining Data from raster and polygon

I am teaching myself GIS at the moment, and there are still some matters I haven't quite got the hang of. I'm using ArcGIS 10.1, and have three datasets: LAYER 1: A population dataset at a high ...
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12 views

NLCD zonal analysis [on hold]

I have been working with the tree cover data for months using both the cathographic and analytic data trying to extrapolate tree cover percent at the census tract level. I first did a raster clip of ...
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1answer
28 views

Changing the origin of a raster?

I have a raster file that is projected not detailed enough. Every pixel in the raster should be replaced, just a bit. With ArcGIS I calculated the offset per pixel. I couldn't find a way to do this ...
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2answers
35 views

Calculating area of polygon within square mile in ArcGIS?

I would like to create a raster, where in every cell it returns the area of land in a polygon feature. So for example, every cell in the raster would give park land per square mile, or vacant land ...
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16 views

DEM to RGB-GeoTIFF (land-/waterarea colored separate)

I want to create a colored basemap out of a ETOPO dataset. Is there a way to color the land (masked by a landpolygon) and water area separate and combine them later. The result should be one GeoTIFF ...
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8 views

r.sim.water causes crash when run on GRASS 7

I'm trying to run r.sim.water on GRASS 7.0.3 (Windows), but the module crashes directly after starting, with no error message. I only get the message that python.exe doesn't work anymore and have to ...
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8 views

Reprojecting and Aggregating a 30m resolution raster to a 3 arcsec raster

I am a using a 30m x 30m resolution land use raster that is projected in NAD83 Québec Lambert but would like to convert it to make it compatible with a 3 arcsecond flow accumulation raster that is ...
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19 views

ArcGIS, Combine tool. Crashes once reaching 40% progress

I'm trying to combine 7 rasters containing soil related data. Rasters are 4.5G, give or take. All the rasters contain integer values. Once the combine tool reaches 40% progress, it stalls and arcmap ...
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1answer
22 views

Convert/display grayscale image as RGB

i want to display raster images using a color palette in a leaflet map. The images are tiled (gdal2tiles) from a single .tif to multiple .png files with values from 0 to 100. I add the image using ...
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0answers
11 views

Multiplying raster with different dimensions in R

Trying to multiply various raster with same crs and resolution fails due to different dimensions and extent of the raster. Setting the same extent to all raster results in a change of resolutions. ...
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2answers
127 views

Qgis: style a discrete raster

I have rasters with discrete values (Landuse categories, boolean values...). I would like to be able to style them in a discrete way: 0 -> Red 1 -> Blue 2 -> Green ... I wish something ...
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1answer
26 views

Failed DEM via Natural Neighbor in QGIS 2.14.2-Essen

Following the indications of Monde Geospatial (https://www.youtube.com/watch?v=bLbY3iMBW-A) I created a CSV file with the altitudinal data (Google Earth) for 2182 total points and imported it into ...
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1answer
40 views

smoothing raster layer stack using R

I'm trying to do smoothing for .tif stack layer of 331 bands. I used this code in R : setwd("D:\\") raster_dir <- "D:\\Modis VI quality\\" VI <- ...
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2answers
36 views

Why does Clip function (maintain clipping extent) not clip according to polygon feature?

In arcGIS 10, I have several raster maps, that I would like to clip according to a polygon feature (top map). I have tried the Clip function under Raster Processing<-Raster<-Data Management ...
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33 views

How to show a 2.5D surface of raster above terrain layer in Cesium?

I'm developing an web application that will show surfaces of rasters and terrain. These rasters are on GeoTiff format. I learned from example cesium can show image overlays earth surface. The ...
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1answer
89 views

Warning: implicit list embedding of S4 objects is deprecated

From this code: na_cells <- as.data.frame(extract(r_temp, poly_contour, cellnumbers = TRUE)) Why do I get this warning? Warning in `[<-`(`*tmp*`, cnt, value = p@polygons[[i]]@Polygons[[j]]) ...
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1answer
43 views

Storing Lat Long Ranges in Tables

Has anyone tried to store nation-wide lat/long ranges as a look-up table? For example: If you had a polygon dataset that covered the entire US (for example, county polygons). And you wanted to look ...
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21 views

filter a raster stack in Arcgis

i'm trying to run "Filter" operation using AcGIS on a stack layer of 331 bands. However, the result is always a raster of only one band. How can i get operation to be done on the whole stack?
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1answer
26 views

Arcmap - raster positioning on the map

I work in Arcmap 10.3.1. I have raster dataset - spatial reference 3413 My problem is that I can not send this data on a map. Sequence: Add raster dataset Add basemap How do I display the ...
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32 views

How to integrate set of neighboring pixels in raster dataset?

I generated peaks of tree crowns as an individual pixels from DSM dataset, but there are some trees that have more than 1 peaks. I would like to integrate them based on the threshold value, for ...
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1answer
48 views

How to select lines affected by sea level rise?

I'm doing a part for my master's thesis where I'm trying to find out which sites located near the coasts of Sweden that will be affected by sea level rise. I got a DEM with height data and have to ...
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1answer
40 views

Create repeating pattern of raster or polygons in ArcGIS

I want to create a repeating pattern of raster OR polygon features based on an existing sample, so that the sample fills up a larger area in a repeating pattern. For example, with a sample of 10x10 ...
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2answers
22 views

extract pixels of raster1 that overlap with raster2 in ArcGIS for Desktop?

I have 2 partly overlapping raster datasets, would like to extract pixels of one dataset that overlap with another dataset. Is there a tool in ArcGIS for Desktop to do this?
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1answer
44 views

Aerial picture - how can I extract water drainages on a crop (to vectorize them)

I have a RGB aerial picture of an agricultural crop. The drainages (hundreds of them) can be barely seen because they a very slightly greener then the surrounding crop area (picture is from April). ...
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21 views

Creating consensus raster? [on hold]

I have four LULC rasters for my study site from different sources. Neither of them are very accurate (from closely looking at each of them on google earth). I want to create a consensus raster by ...
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1answer
16 views

Swapped axes in R raster brick plot from netcdf

I am using the R raster package to import a tiny sample netcdf file, available here: https://www.dropbox.com/s/fht4g52p948vxva/persiann.ncml.nc?dl=0. The main data website is: ...
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1answer
23 views

Remove raster pixel in R

This is the 32 year trend NDVI (raster data) I would like to remove the green grids data by using R (the green pixel value is larger than 0.03) and this one is R code that i use but i cannot ...
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104 views

QGIS python script loop for raster calculator

How can I write a QGIS script for making a loop of raster calculator through a set of rasters? I know I can read multiple raster by applying: lddLrs = qgis.utils.iface.legendInterface().layers() for ...
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45 views

Why is my attributes table greyed out for raster layers?

I am trying to view attribute data for a SRTM geotiff but for some reason I cant view the data.
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16 views

R: how to export my Kriging result to raster? [duplicate]

I want to export results of my Kriging calculation to raster or some other format. My aim is to take this converted file and intersect it with another SpatialPointDataFrame (location of the point ...
4
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1answer
34 views

Reclass to decimals

I have a integer raster with values 1 - 10, I would like to reclass each value to a decimal e.g 0.003, 0.44 etc. This obviously doesnt work in the Reclass tool, as only whole numbers are allowed. Does ...
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1answer
39 views

Using raster calculator to show multiples of particular value?

How do I use raster calculator so that the new raster only shows multiples of 128? I'm not sure what the expression should be.
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63 views

Convert raster to smooth contour polygons in QGIS

I have had limited success creating smooth contour polygons from a raster layers. I have created contour lines and boundary polylines and then used QGIS Union. Then I use QGIS Polygonize. Then ...
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2answers
30 views

Raster to KML convesrion [duplicate]

How raster data can be converted to KML? I have searched but could not find any answer. Are there any tools in Arc toolbox for such process ?
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How to query raster in PostGIS within GeoJSON mask only

I have a raster in PostGIS which I need to query pixel values from, but only within a specific area. So I have a GeoJSON polygon within which I want to extract min/max/avg values of the raster from. ...
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1answer
29 views

How to set the outline color of raster cell (pixel)?

Can somebody please show me how to set the outline color of a raster cell (pixel)? This is what I have right now: This is what I am trying to do: I googled a bit, and looks like it is somewhere ...
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14 views

R Freezes when Plotting Spatial Data Frames

I have run into a problem where anytime I try and plot a Spatial DataFrame in R, the console freezes, regardless of the size of the file. I imagined this must be due to an issue with the path to one ...
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1answer
19 views

How to work with Baccini et al.'s biomass map from ArcGIS?

Baccini et al. (2012) has produced one of the best biomass maps available for the world. One can find the map from one of ArcGIS repositories here. I downloaded the .pkinfo file for that map but I ...
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21 views

How to get all pixel values of raster within a GeoJSON FeatureCollection in PostGIS

I need to extract all pixel values in a raster within a GeoJSON mask, using ST_Intersects. Attempt (throws invalid GeoJson representation): select row_to_json(t) from (select * from table_name where ...
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1answer
22 views

Error in rasterToPolygon trying to get several coverage layers

I have a very strange problem: I am trying to get a raster with coverage from 0 to 1 in each cell for types of vegetation, I started with a raster of vegetation type, but I needed a raster with 12 ...
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14 views

How to calculate the world file [duplicate]

I have map image of size 2500x 2500 and i know the extent of the map image which is xmin=454651.17794, Ymin=2738724.37939,Xmax=550197.46330 and Ymax=2834270.66475. The Xmin and Ymin calculated from ...
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3answers
117 views

Statistics on classified raster overlaid with a polygon vector

I have a classified raster file and a polygon vector file. I need to overlay polygon and find out area occupied under each classification in each polygon. I am not familiar with R. Can you please ...
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2answers
82 views
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R: speed up raster to polygon conversion in R?

I've decided to process my Landsat data in R instead or ArcGIS - due to my missing knowledge of python and and because of (assumed) high computation capacities of R. I want to : import r1 raster to ...
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53 views

Size of an object in raster image based on DPI resolution and number of pixels

I'm trying to estimate the size of an object in a raster image, with known DPI resolution. To evaluate the validity of this method, I do as follows: 1) I'm drawing a 0,02 in × 0,02 in black square ...
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1answer
98 views

Why does the difference between two overlapping rasters exist?

I have two similar rasters of the Mount Vesuvius: one spans 20 kilometers, and the other one 50 kilometers. Both rasters are in WGS84 geographic coordinate system, and they overlap between each other: ...
6
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2answers
167 views

Transforming geostationary satellite image to lon/lat

The ICARE Data and Services Center distributes the SEV_AERUS-AEROSOL-D3 product in HDF5 format (http://www.icare.univ-lille1.fr/archive/?dir=GEO/MSG+0000/SEV_AERUS-AEROSOL-D3.v1.03/). The main ...