Questions tagged [vector-grid]

Use for questions about vector grids which are also known as fishnets. For questions about the Leaflet Plugin please use the tag "vector-tiles"

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1answer
29 views

Different number of grid cells between years when using a grid layer to look at area of land cover change over time

My goal is to calculate the area of mangrove cover (vector layer) per grid cell (vector layer) over time (yearly), to determine land cover change. I have tried two ways so far. Initially I wanted to ...
1
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1answer
37 views

Ortho Grid in QGIS straight and curved

I'm really new to GIS tools. I'm trying to make ortho projection maps of all the countries. I've downloaded Natural Earth Data and QGIS. I imported the data files by dragging them into QGIS. I added a ...
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1answer
24 views

Expanding existing point grid to cover larger area in ArcGIS Desktop

I am looking to expand the already existing point grid system to encompass the entire polygon pictured below without changing the existing point locations or label features. Is there a tool in ...
24
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4answers
38k views

Creating fishnet grid Shapefile in QGIS?

How do I create a fishnet shapefile using QGIS? The equivalent task of "Create Fishnet" in ArcGIS.
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1answer
434 views

Sorting grid cells in fishnet grid by location and number using QGIS?

I am using QGIS 3.2.0 on a Mac (and also have QGIS 2), and I have a fishnet grid (probably created in Arc) that comprises of nearly 2 million grid cells. As a result, every change I make to the ...
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1answer
33 views

QGIS sum up polygon features inside grid

I have a grid with population points inside each of the individual cells. I've used the "join attributes by location" tool to join each population point to their respective cell. Now I'd like to sum ...
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0answers
15 views

Establish grid computing on Google Earth Engine

I want to build a grid on the MODIS image and calculate NDVI in each grid.I already have a calculation method for NDVI. I don't know how to build a grid. Hope someone can help me solve this problem. ...
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1answer
32 views

Getting polygons out of .shp

I have a shapefile with lines. In the attributes of the line shapefile I have known coordinates. I want to get polygons out of these points which reach to the next line. As a goal I want a grid out ...
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0answers
13 views

Zonal statistics projected differently ArcGIS Pro 2.5

I have a fishnet of equally sized raster cells of 1/4 degree, which spans the whole world. Furthermore, I have a netCDF file containing precipitation data. I load both, the shape and the raster file, ...
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0answers
22 views

Creating grid in QGIS representing trial plots

I would like to create a grid in QGIS. This grid shall represent agricultural trial plots (each plot about 4,5 x 10 m). Digitizing each polygon is time-consuming and not very exact. Is there a simple ...
2
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1answer
92 views

ST_Area(geometry) with ogrinfo estimates a stable area per grid cell

I use ST_area(geometry) in order to calculate the area of each grid cell of a vector grid with LCC projection and 6x6km2 resolution. The CRS of the vector is: +proj=lcc +lat_1=45 +lat_2=22 +lat_0=38.7 ...
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2answers
426 views

Creating fishnet along linear feature in ArcGIS Desktop?

I want to create square grid of polygons along a polyline(Road). Assigning spatial extent of the polyline will create grid squares not containing the line as well. Do I have any other options ?
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0answers
33 views

Calculate Percentage population from Vector Grids

I have a vector grids layer of population (shapefile). Each grid represents population in that grid and have the following attributes: Area Population I want to calculate and display the percentages ...
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1answer
12 views

Assign coordinates to grid-cell in QGIS

I've created a grid using make grid in QGIS. The type of grid is rectangular (polygon) and it's 0,1 x 0,1 decimal degrees. I now want to assign an X and Y coordinate to the centre of each grid. Would ...
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1answer
37 views

Matching points to grid-cells - using join attributes by location

I have point data in a shapefile covering most of Africa. I've made 0.1x0.1 grids using the make grid option from QGIS and now I want to link the grid_id to my point data. Below you will find a ...
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1answer
30 views

Cannot run “Create Fishnet” tool in ArcPy

I've been trying to run an ArcPy code which creates a fishnet for sampling. Everything in the code works fine, but when it gets to arcpy.CreateFishnet_management(), it stops running. I've already ...
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0answers
28 views

Turn a grid an place

I have a grid over a rasterlayer and a second a line .file. I want to place the grid paralell to the line shape or dock it on the shape file. I tried it with turning the grid manually, but it takes ...
2
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1answer
1k views

Splitting all polygon features in a shapefile into smaller equal width polygons

I have a shapefile of thousands of polygon features, that i would like to break up into smaller pieces (i.e. break a square into 8 equal pieces). I have read all over these boards for the right ...
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1answer
60 views

Slow processing in ArcMap

I am working with the vector files: Landuse classification shapefile for a certain area with 4 landuse categories - builtup, vegetation, water and open spaces. (area bounds = 95sqkm). I classified a ...
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1answer
28 views

Make fishnet visible but not snappable [closed]

I'm currently using a polyline fishnet grid to use as a guide when labelling land features. For example, I aim to label 10 grids per day. An issue I have is that when creating my polygons they keep ...
2
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2answers
40 views

QGIS 3.12 print composer - how to rotate map but keep grid unrotated?

I am creating a map using QGIS 3.12 and wish to rotate the map and add a grid using print composer, but I want to keep the grid unrotated. Is this possible or does the grid only rotate with the map?
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1answer
41 views

Preventing ArcMap from labeling when creating grids?

I am using the Create Polygon Grid Wizard to make a large number of grids. Is there anyway I can stop ArcMap from drawing the grid labels as they are created? It seems to take much much longer to ...
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0answers
53 views

Converting a 2x2km point grid to a coincident 1x1km grid

I needed to convert a 2x2km point grid (specifically the LUCAS grid) into a coincident 1x1km grid. Is there a "simple" way of doing this in QGIS?
2
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1answer
47 views

Vector grid id generation [duplicate]

I generated a grid with 300m spacing but the ids generated from top to bottom in sequential oder. How could I get in horizontal from left to right sequence.
1
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1answer
73 views

Dividing up vector grid and scoring cells using QGIS?

I have a map of an area, have created a vector grid over this, and want to score different areas of the map by risk (high risk, medium risk, low risk), by scoring each cell. I want to define these ...
5
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1answer
261 views

Integrating NTv2_SN.gsb grid in QGIS

I want to integrate the NTv2_SN.gsb grid in QGIS. I have a dataset in CRS EPSG:31469 and want to transform into CRS EPSG:25833. Therefore I want to integrate the NTv2_SN.gsb into QGIS. But I have some ...
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1answer
39 views

Rotate Data for Gridding

I have sample data that was collected in lines. I would like to rotate the data to North-South so that I can rasterize it, then back to the original NAD83 Zone Projection where it's situated at an ...
11
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2answers
12k views

Creating polygon grid using Geopandas

I'm working with a geodataframe of points and I need to create a grid of rectangular polygons. I know how to have bounds of the geodataframe with gdf.geometry.bounds. Now using this information and ...
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1answer
39 views

How to display 1,000,000 fishnet polygons in ArcMap?

I am working on ArcMap. I have created a fishnet with 1,000,000 polygons for pixels of size 0.125 degree. I would like to display the map for a variable that varies across cells. I tried symbology and ...
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2answers
25 views

How to join maximum values from a polygons layer to other gridded polygons layer in QGIS?

I have two overlapping SHPs. One is with two noncontinous polygons - values 0 is blue and 1 is green. Now I have 9 meters grid for the same area, but I need to "fill" the grid with values from ...
0
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1answer
58 views

QGIS fishnet problem

I have create a grid in QGIS. But I don't have coordinates, I would like to sketch on the basis of Google satelitte, that uses Pseudo Mercator projection. I tried GRASS mkgrid, but something went ...
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1answer
30 views

Non-random sampling of point vector layer in QGIS

I have a point vector layer with 47.000.000 points representing elevation. It is a regular grid with constant spacing. I aim for rasterization but it is very slow. I know how to do random sampling but ...
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2answers
722 views

QGIS regular points around each polygon in a layer

I have a number of buffered points (somewhere polygons intersect & are dissolved. I'd like to create regular spaced points grid around EACH polygon -- not ALL polygons. When I do Vector -> ...
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0answers
5 views

Why would the Extract Multi to Points not extract values to all points when the raster and the point clearly overlay?

I have four rasters and a point feature that all live in the same file geodatabase and have the same CRS. The point feature covers a large area. See image below: The rasters which values I wish to ...
2
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1answer
61 views

How to calculate how many grid squares a line shapefile covers

I have a load of transect data (in the form of a line shapefile) covering a very large area (approx. 11,900km2) that has been split into 20m x 20m grid squares on QGIS using: "Vector -> Research ...
1
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1answer
39 views

Joining each grid cells with many records in QGIS

I have a grid (10 x 10 km) where each cell is identified by a code a shapefile, a point layer, with the year when each point was sampled as shown in the figure below. As you can see from the image ...
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0answers
40 views

Leaflet poor performance on pbf animation

I am trying to animate different tilesets for precipitation data on leaflet map. I create layers upfront for next and previous timestamps. I have done the similar logic using MapBox and animation and ...
4
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1answer
91 views

QGIS refFunctions override maximum amount of features

A have a polygongrid on a 1x1m spacing. I have multiple XYZ files also on a 1x1 grid. I would like to write the Z-value of the xyz-files (is in geometry and in the DB) to the polygongrid if the XY of ...
3
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4answers
2k views

Vector Grid Layer on QGIS

In QGIS, I'm trying to create a vector grid layer with cells 150m x 150m, yet it only seems to be possible in degrees. Is there a setting I need to change, or is there an equivalence I can use to ...
1
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1answer
134 views

Creating a Grid in QGIS of with 1meter intervals [duplicate]

I need to create a grid over my QGIS shapefile, with 1m intervals. I know the procedure of creating the grid; view -> decorations -> grid My question is, what is the x and y intervals that I need to ...
0
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1answer
32 views

Getting grid data to a CSV file

I have a road shapefile of a selected area of 1km x 1km created in QGIS. I have also been able to create a grid shapefile of 1m x 1m intervals over my area as below: - Is there a possibility to get ...
2
votes
1answer
49 views

Create within-country grids for multiple countries at once in Google Earth Engine

I have a dataset on countries in sub-Saharan Africa (which is set so that anybody can use it): var SSA = ee.FeatureCollection('users/salem043/Africa_Districts') .select("ADM0") I would like to ...
9
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4answers
16k views

Creating square grid polygon shapefile with Python?

I have the following coordinates minx, maxx, miny ,maxy = 448262.080078, 450360.750122, 6262492.020081, 6262938.950073 I wish to create a square grid of size 1 m using python. import math minx,...
4
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3answers
75 views

Create a new grid layer from a CSV, given the four corner coordinates

I'm trying to add a new grid layer by importing it from a CVS file. In the CSV, each line represents a grid, and the coordinates of the four corners are given. Moreover, the grid contains its own ...
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0answers
36 views

Join attribute by location giving bigger results QGIS

I have created a grid over South Africa, each cell being 10 km x 10 km. In addition, I have a raster layer that has been polygonized, each polygon containing a population count. The total of these ...
1
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1answer
113 views

Automating select polygons by distance within same layer using QGIS?

I have say, 6,000 polygons roughly 25 acres each, all touching one another, basically a grid but with irregular shapes. Using QGIS, how do I start with one shape then in an automated process, select ...
1
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1answer
48 views

How to convert a QGIS Composer Grid to polygons

I really like the cartographic aesthetics of the QGIS 3.10 Composer Grid, especially the border created by using the "Zebra" style and "Fit Segment Length" option. Because of its design, I'd like to ...
2
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4answers
2k views

Looking for a fine U.S. Latitude and Longitude grid (0.25, 0.5 degree)

There is a global latitude and longitude grid data available at 1 degree resolution and higher (http://www.arcgis.com/home/item.html?id=f11bcdc5d484400fa926dcce68de3df7). Is anyone aware of a finer ...
2
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0answers
63 views

Point grid in QGIS

I'm working on a project that needs me to map out a point grid for drilling work. The grid needs to fall within an already created polygon and be spaced 30x35meters. I was able to overlay a pointgrid ...
3
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1answer
88 views

Counting MODIS burned area pixels inside a grid in GEE

I am using MCD64A1.006 MODIS Burned Area Monthly Global 500m product in GEE and trying to count the number of pixels with a value inside of each grid cell in a vector grid I created. // load MCD64A1 ...

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