Questions tagged [raster-conversion]

Raster conversion between raster formats. Do NOT use for raster to vector conversion (and vice versa) - for that use vectorizing (and rasterizing)

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143 views

Converting a Raster to Polygon and Dissolving Issues using ArcMap 10.5

I have a large forest habitat raster dataset (several watersheds in state of Oregon) that I need to convert into a shapefile. The raster has 70 different categories of habitat types. Steps: I've ...
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36 views

Create cloud optimized GeoTIFF without re-encoding?

I have a lot of jpeg-in-geotiff imagery that I would like to convert to Cloud Optimized GeoTIFF. Is there any way to do that without re-encoding the pixel values? I'm trying to avoid paying the price ...
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0answers
18 views

Converting 3-band raster of a topo map into Unique Values with Colormap or by Reclassifying using ArcMap

I'm using a 1998 USGS topo map for a geologic map base in ArcMap 10.5.1. Right now, the topo raster is in 3-bands with an unsigned 8-bit pixel type. Strictly for cartographic reasons, I need to strip ...
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1answer
484 views

List of vector to one raster in PostGIS

I need to rasterize a part of OSM map by coordinates. I found rather good algorithm, but can’t finish it. I have problems in STEP 3. I described all algorithm here – may be someone have the same task....
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1answer
19 views

Render the point shapefile and raster layer together as single image

I have a point layer as one shapefile and MrSid file as raster layer. How to overlap these two layers and clip the merged layer and render it as an output image file?
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1answer
24 views

Converting Raster Values from Long Integer and Double Values to Short Integer

In order to make my categorical raster data compatible with another model, I need to convert the values from Long Integer and Double to Short Integer. Is there a way to export or convert the files ...
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1answer
54 views

Converting raster to polygons in ModelBuilder using FOR iterator gives ERROR 000622

I am having trouble with a section of a larger ModelBuilder routine. I have extracted all but the offending tools to see if I could get those to work. Basically, it takes a raster DEM and converts it ...
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12 views

Creating new raster layer based on operations in another layer in ArcMap

I am using ArcMap 10.7. I am to do a multi criteria analysis on a tract of land to determine suitable areas for housing development. One of the criteria is "amount of hectare of green land within ...
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1answer
32 views

VIIRS Snow Cover Data Product in GEE

I'd like to incorporate the VIIRS Snow Cover Data Product (global version VNP10C1) into my GEE code because of it's increased 375m-resolution compared to the MODIS Snow Cover Product (500-m resolution)...
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1answer
135 views

Modify a Python script to one that uses RasterDomain_3d fuctionality - and writes resulting shapefiles it to one

As I am not very experienced with Python I need your help. I managed to modify a Script (that has been posted here Get boundary of raster image as polygon in ArcGIS Desktop? by https://gis....
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1answer
98 views

Converting File Geodatabase Raster to TIFF [closed]

I am trying to export a raster file, saved as File Geodatabase Raster (FGDBR), as a .tif The usual tools have not worked for me: data>export feature (resulting error: failed to create raster data ...
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25 views

Export ArcGrid Raster to Esri file geodatabase on MacOS

I have downloaded this dataset, what I believe is an ArcGrid Raster, from this site. However, I ideally would like the data to be in a file geodatabase format so that I can access it using GeoPandas ...
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1answer
1k views

Add layer to RasterBrick R

I have a RasterBrick and I am trying to add new layers to it, (with addLayer) but every time I try I receive the following message: Error in sapply(x, fromDisk) & sapply(x, inMemory) : ...
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1answer
54 views

How to convert grid to vector in SAGA?

I need to convert raster to vector, I have data from a field in two layers. In the first i have DSM (digital surface model) and DTM (digital terain model) in the second layer. Based on difference in ...
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1answer
276 views

Error in batch process converting raster from .img to .tif in QGIS 3.4.8

I'm a long time GIS user but new to QGIS. I can convert single raster files in .img format to .tif files in QGIS 3.4.8 without any issues. However, I cannot batch process the same files. The Python ...
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0answers
2k views

Converting raster file to vector in QGIS takes long time [closed]

I am a new user of QGIS, and I am trying to convert a .tif file in a vector. To do that I have used the "Raster conversion" option, but it is taking a long time. I am waiting 20 minutes for ...
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2k views

Converting raster to line vector layer

I would like to convert all values having the value 1 in a binary raster to a line vector layer. The following image shows the binary raster (1=white and 0=black): The optimal output would look like ...
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31 views

Creating shapefile of a raster image in QGIS 3.6

I use QGIS 3.6 on Windows and I have been trying to convert raster images into shapefiles. I managed to do that for Digital Terrain Models only, using the conversion --> vectorize tool in the qgis ...
2
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1answer
65 views

Converting raster to integer values and exporting as 16 bit using QGIS

I am trying to export a DEM raster as a 16 bit image using the Raster>Conversion>Translate drop down menus in QGIS. I have seen somewhere I need to save it with a -ot tag to turn it into a 16 ...
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1answer
20 views

QGIS: multiple mosaics bands to 1 Visual RGB

I have UAV raster converted with Pix4D mapper in transparents mosaics blue, green, red, nir, pir. Which tool can I use to translate into a visual RGB image?
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1answer
55 views

Burning zeros instead of nodata in GDAL rasterize

When rasterizing a vector layer I would like to achieve an output that contains 1 for areas covered by the shape and 0 for areas not covered. So far GDAL always converts areas that are not covered to ...
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1answer
35 views

Calculate focal statistics from a 10m raster to populate a 1km raster, using the 1km raster to define the window?

I have a binary raster (1-0), cell size = 10m. I would like to generate a 1km raster, where cell values equal the mean value of all cells within a 3 km radius. I know I can use focal statistics to ...
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21 views

Converting raster image to feature in GEE

I am new to GEE, and aim to use reduceToVectors() to convert pixel-value = 1 in a binary image into a featureCollection, calculate the areas of all polygons and finally select polygons above a certain ...
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23 views

Clipping vector polygonised from raster

I have vector created by conversion of a raster to vector operation. I want to clip this vector file. While I am trying to do that, I am getting the below mentioned error: Feature (355) has invalid ...
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1answer
123 views

How to export a single band raster to an ascii XYZ file in QGIS 3.14?

In QGIS 3.14 , how can I export a raster (GeoTIFF) file as a XYZ formatted textfile, like; Lon Lat z 123.456 34.567 23.45 123.447 34.588 20.22 ... ... ... Seems I have two ...
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18 views

Does raster to polygon conversion impact area calculation using calculate geometry?

I am a beginner GIS user. I am trying to calculate the area of clipped buffers which I have intersected using the intersect tool by a habitat raster which I am working with. The edge of the ...
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47 views

Using aggregate function in r with function from package landscape metrics

I am trying to combine the information from two raster data sets: The first data set contains information on the numer of fotos uploaded on flickr in a given raster cell (ot_fl1k). The second dataset ...
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1answer
105 views

Google Earth Engine: Converting raster to vector in the same resolution as the original image

I am using Google Earth Engine to reduce a raster region to polygon vectors. What I want to achieve is: Obtain a set of polygons each of which matches the grid of measurement in the raster dataset. ...
3
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1answer
73 views

Identifying and quantifying gullies and hags from aerial imagery in QGIS

We are involved in an extensive peatland restoration project in the Shetland Islands. We provide high resolution and accurate digital surface models and orthomosaics for initial analysis and on-going ...
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38 views

How to write natural logarithm in SNAP software

I want to compute the temperature of a band using the equation: where L(6) is Band 6 of a Raster file and K1 and K2 are constant. I am using Band Math to perform conversions. However I could not find ...
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1answer
161 views

How to reproject Raster/Vector in Global Mapper with custom geographic parameters?

I am using Global Mapper 21 and i want to reproject raster/vector data with custom geographic parameters. I can do it with ArcGIS (create custom geographic transformation). I have 7 parameters that ...
3
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1answer
718 views

Python: Convert DEM to 3D array organized as [lat, long, elevation]

I'm trying to convert a .tiff DEM to a numpy array using python. Ideally the array will store latitude, longitude (or some coordinate alternative), elevation). I'm using Gdal but currently it only ...
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34 views

How can I join values of Point features to raster dataset in ArcGIS?

I have to join point values to rasters. Every points are located at the geometrical centre of the raster cells. Every single cells have to include the point values that are in their centre. ...
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1answer
1k views

QGIS 3.4 - Rasterize creates layers with 1.79769e+ 308 min/max values

I have tried searching on here for my issues, read many threads, but to no avail. Essentially, I am trying to convert a line feature to a raster so that I can run proximity on it - because I want to ...
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24 views

Point to Raster - receiving integer although Points are floating point

I had to adjust a few raster cell values of a DEM, that's why I converted the raster DEM to point shape file and fixed that. Now that I want to generate my DEM again I have the following issue: While ...
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0answers
27 views

In ArcGIS, exporting a GRIB file to a different format changes the cell values of the original raster

I downloaded some climate variables from Copernicus as GRIB format. ArcGIS 10.7.1 allows me to directly add them to my table of contents and it shows me, as usual, some maximum and minimum values. The ...
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3answers
2k views

How to display Flow Direction arrows + Burn Stream Netwok in QGIS?

I have used the automated r.watershed tool in QGIS 2.18 (GRASS plugin) to conduct a watershed analysis (basin boundaries, flow direction, flow accumulation etc). I'm stuck on the following operations:...
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2answers
1k views

Converting raster pixels to polygons with GDAL python

I want to convert raster pixels to vector polygons as below image that is output of "Processing Toolbox--> Vector Creation--> Raster pixels to polygons" in QGIS 3.8: I tried to do this vectorize with ...
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2answers
432 views

GeoServer not rendering GeoTIFFs after JPEG compression [duplicate]

I previously asked about some problems I was having converting JP2/MrSid data to GeoTIFF for use in GeoServer. It was suggested that I needed to add overview data to the 4 GB-sized GeoTIFF -- and that ...
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0answers
114 views

Convert full colour height map to greyscale

I try to convert full colour map with colour range like this: to greyscale. I use mostly Corel Photo-Paint (similiar functions to Adobe Photoshop), but maybe QGIS or ArcMap could help?
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2answers
313 views

.tif file conversion to .bil format [closed]

I want to convert .tif files I have downloaded from the worldclim database to .bil format which is required by landscape genomics package. I can use some of the R spatial packages.
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0answers
114 views

How to covert a GeoTIFF DEM to a standard raster format without losing quality or resolution

I'm working on a project, a spin-off of my graduate dissertation, to digitize LiDAR data of a portion of Tampa Bay (20x20 km^2 at 1:1 scale) into a Minecraft map. Ideally I want not just accurate ...
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1answer
945 views

Downsampling, projecting and aligning a raster to fit another one in R: aggregate(), resample() and/or projectRaster(), and in which order?

TL;DR: I have to downsample, project and align a raster to perfectly fit another one. Is it better to a) use aggregate followed by projectRaster or b) first use projectRaster for reprojection only ...
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2answers
240 views

Converting raster to lat/lon points [closed]

I am working with the tri.txt (terrain ruggedness index) file from this paper: http://diegopuga.org/data/rugged/ I've uploaded the raster data from the file into ArcMap and now have it as a .tif file....
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1answer
5k views

QGis Save Raster as Rendered Image

In QGIS 1.9.0 Master, when you right click on a raster in the Layers Panel and select "Save As", you can select the output mode to be "Raw Data" or "Renedered Image". When selecting the Rendered ...
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1answer
71 views

Using gdal_translate to round pixel values in raster - I'm getting an error

I tried to follow along at question: Rounding raster pixel values to one decimal place in QGIS but my python script throws a syntax error at GTiff. I do have one that works for ArcGIS but my end ...
2
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1answer
5k views

Spatially joining large raster to polygon shapefile

I have a large raster file with elevation data. From this raster, I would like to infer the average ruggedness for different geographic zones (like countries). I have the "countries shapefile" as a ...
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1answer
136 views

Create polygons from raster with only a selected amount of features (not each pixel a different polygon)?

I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). I want ...
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1answer
53 views

GIS points to raster [duplicate]

I have a shapefile of 1241 dam locations in Washington, if I open the attribute table I have only latitude and longitude. I want to convert this to a raster with counts of the number of dams in each ...
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2answers
168 views

Con function loop not calculating for all fifty rasters in list

I have been trying this for hours and I know it should be easy but I can't make it work yet. I have a list of 50 rasters that I need to change the NoData to "0" values. I have the right arcpy ...

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