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

learn more… | top users | synonyms

0
votes
0answers
20 views

Reading and writing block windows with Rasterio? [on hold]

I'm trying to go about reading large rasters by the block windows in Rasterio. Everything works and I can iterate and output the flat file for my coworkers, but I can't for the life of me figure out ...
0
votes
0answers
15 views

raster::intersect not producing expected results

I am having trouble with R's raster::intersect method. I give intersect a SpatialPolygonsDataFrame and SpatialPoints as documented in the raster reference manual (p. 111). The result acts like it ...
1
vote
2answers
39 views

Extraction of raster with shapefile python

I have a raster tiff file containing vegetation index & also a shapefile of fields. I want to extract the field wise values from that raster file using GDAL. How can I do this? I can read the ...
0
votes
0answers
13 views

Single channel Change Detection

I want to write script for Google Earth Engine, which will create bitwise mask of changes. Earlier I made through ScanEx Image Processor and this function is called "Single channel change detection". ...
1
vote
0answers
21 views

Unsupported Source

If I try to save a raster files from a WMS once saved tells me that the source is not supported, "Data Source not supported: /Users/beatriceluise/Desktop/wms/Senza titolo.tif is a raster data source ...
1
vote
1answer
26 views

Spatial correlograms for binary raster?

I have binary raster data (deforestation hotspot or not) that I would like to plot spatial correlograms for in R, to look at spatial autocorrelation over different spatial lags. I came across this ...
0
votes
1answer
16 views

Vector tiles to MBTiles

I need some clarification regarding MBTiles. I am generating MBTiles in 2 different ways: Using TileMill Using Mapbox tm2 to MBTile using TileCloud In TileMill, does the exported MBTile contain ...
0
votes
0answers
12 views

Overlaying data from a raster generated using Interpolation tool with Shapefile or a raster

For my project, I intend to identify if parameter A has been exceeded in forests. I have a shapefile for forests and converted that to a raster (if needed). I have point data for Parameter. I used the ...
2
votes
1answer
35 views

Getting long-lat coordinates from NARR LCC-gridded data using raster and rgdal in r

I am studying migration ecology of sea ducks on the Atlantic coast of North America. In my analysis, I require substantial environmental data over a large geographic range for the past 15 years and ...
1
vote
1answer
20 views

PostGIS raster to UTFGrid

I am trying to create a UTFgrid JSON with a Raster in PostGIS. The goal is to provide weather data for web maps. I found some libraries: https://github.com/Ecotrust/create-utfgrids ...
1
vote
0answers
22 views

Per-pixel Descriptive Statistics through multiple Raster layers

I'm looking for computing different descriptive statistics through a set of raster layers. I need to make it with a python script capable of running into a standalone tool within the QGIS. To do so ...
1
vote
1answer
16 views

How to “clean up” undesired values in a slope raster

I have a reclassified slope raster with 3 values in band 1. My problem is that I want to polygonize this layer, but the surface is so irregular with a lot of plots in terraces and because of this it ...
0
votes
1answer
18 views

r.patch results in a blank map in GRASS

I have a collection of tiles downloaded from the EDINA Digimap service, in asc format. I imported these into GRASS using the r.in.gdal function, and they appear in the display screen as expected. I ...
3
votes
2answers
28 views

Error to obtain coordinate reference system argument from a raster image in R

I got an error when i wanted to obtain the CRS from stacklayer. I don´t know what could it be. I need some advice or help to obtain it. This is my code. #LOAD RASTER LIBRARY >library(rgdal) ...
0
votes
1answer
23 views

Rescale raster in R

What's the best way to rescale a raster with range 0, 200 to range -1 to 1 in R? I'm currently using gdal_translate, but this requires that I write out a new file with the updated range. If possible ...
1
vote
0answers
57 views

Problem aligning historic map of Poland [closed]

I have downloaded a historic map of Poland. I am having a problem aligning it to a modern map. I have tried various methods and coordinate system using over 50 points, but nothing works. It gets ...
2
votes
1answer
28 views

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 ...
3
votes
1answer
26 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") ...
2
votes
2answers
63 views

Pixelated 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 ...
0
votes
0answers
15 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. ...
1
vote
1answer
28 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 ...
-1
votes
0answers
13 views

NLCD zonal analysis [closed]

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 ...
2
votes
1answer
38 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 ...
0
votes
2answers
36 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 ...
0
votes
0answers
18 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 ...
0
votes
0answers
9 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 ...
0
votes
0answers
12 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 ...
1
vote
0answers
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 ...
2
votes
1answer
26 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 ...
5
votes
2answers
144 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 ...
2
votes
1answer
29 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 ...
0
votes
1answer
41 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 <- ...
0
votes
2answers
39 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 ...
2
votes
0answers
49 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 ...
0
votes
1answer
135 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]]) ...
1
vote
1answer
45 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 ...
0
votes
1answer
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?
1
vote
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 ...
1
vote
0answers
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 ...
1
vote
1answer
49 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 ...
1
vote
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 ...
1
vote
2answers
23 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?
2
votes
1answer
46 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). ...
-4
votes
0answers
21 views

Creating consensus raster? [closed]

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 ...
1
vote
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: ...
1
vote
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 ...
1
vote
1answer
108 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 ...
2
votes
1answer
48 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.
1
vote
0answers
17 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
votes
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 ...