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"
407
questions
1
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0answers
20 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 ...
0
votes
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 ...
0
votes
1answer
26 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
vote
1answer
11 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 ...
0
votes
1answer
34 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 ...
-1
votes
1answer
24 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 ...
-1
votes
0answers
26 views
Creating fishnet in GCS projection using ArcMap
I have earlier created a fishnet in Projected Coordinate System with a dimension of 300 m* 300 m.
Now I want to create the same but in Geographic Coordinate System?
I want to ask specifically ...
1
vote
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 ...
0
votes
1answer
27 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
votes
2answers
39 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?
1
vote
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?
1
vote
1answer
25 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 ...
2
votes
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
vote
1answer
38 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 ...
0
votes
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 ...
0
votes
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
votes
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 ...
0
votes
0answers
4 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
votes
1answer
52 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
vote
1answer
38 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 ...
0
votes
0answers
39 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 ...
0
votes
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 ...
0
votes
1answer
30 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 ...
1
vote
1answer
108 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 ...
2
votes
1answer
42 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 ...
0
votes
1answer
22 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 ...
4
votes
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 ...
0
votes
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 ...
0
votes
1answer
31 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 ...
1
vote
1answer
59 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 ...
1
vote
1answer
46 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
votes
0answers
55 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 ...
0
votes
0answers
30 views
Create Fishnet issues with measurement distance
I am trying to create a regular soil sampling grid based upon digitised field extents.
I had posted a previous question today relating to issues with coordinate systems and displaying the sample ...
3
votes
1answer
82 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 ...
4
votes
1answer
84 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 ...
0
votes
0answers
40 views
SAGA error running “Raster values to points” (“shapes_grid” library)
I am using QGIS 3.10 and I want to generate a "fishnet" shape coincident with the pixels in a raster. I've done this before (in QGIS 3.4) using the "Raster values to points" SAGA tool ("shapes_grid" ...
2
votes
1answer
210 views
How to create a GRID with customized Labels in QGIS
I would like to know how can I create a GRID layer with customized labels as you can see in the image below:
I have searched this topic here:
Creating indexed vector grid in QGIS?
QGIS Python ...
3
votes
1answer
73 views
QGIS under measuring distances
I want to create some transects and a grid with specific lengths, but I realized Qgis is under measuring distances. For the transects I used "Advanced digitizing" (100m lines) and for the grid I used "...
0
votes
1answer
312 views
Grid polygon generation by converting meter to degree using Python
When given a shapefile as below as an Input, I would like to generate a 100x100 meter polygon grid using python.
I went through Creating a regular polygon grid over a spatial extent, rotated by a ...
0
votes
1answer
53 views
ArcGIS align grid of 10km squares with grid of 1km squares
I have a pre existing layer of 1km x 1km grid squares, which is aligned with the 10km squares of the British National Grid:
I want to create another 10km x 10km square grid on top to highlight the ...
0
votes
0answers
22 views
Populating sample units inside polygon using ArcMap
A big part of my job currently is drawing out sample units that are roughly 2500 square ft for inspection and are all located within a polygon for the Section. I made a very quick example below.
The ...
1
vote
0answers
57 views
Creating dynamic overlay grid in ArcMap or ArcGIS Pro?
I have a shapefile of multiple polygon features corresponding to geographic regions that vary in area. The task is to create a dynamic grid over each polygon, with the size of the squares for each ...
1
vote
0answers
73 views
Rotating vector grid in QGIS 3.10 vs 3.8
Just wondering if anyone else has had an issue with vector rotation via the advanced editing tools in 3.10?
I have a vertical grid overlaying Vancouver Island that I had tried to rotate using the ...
1
vote
0answers
33 views
Create grid with a prespecified number of cells inside a shapefile with R
I need to create a grid inside a shapefile with a fixed the number of cells n (inside the shapefile). I tried a few stuff see bellow but nothing worked so far. Any ideas?
The data shapefile can be ...
1
vote
1answer
64 views
Creating grid index (fishnet) features with indexing according to columns
I'm working with west to east river features and I need to index a grid using only numbers and accordinly to columns and not lines. The grid index features tool gives me this numerical sequence of ...
1
vote
0answers
64 views
Generating hexagon (tessellation) fishnet inside hexagon (tesellation) fishnet using ArcGIS Pro
I'd like to create a fishnet or hexagons inside a subset area of hexagons? Basically I want a large cell size for my rural area and a small cell size for the urban area. This is the tool I've used to ...
5
votes
1answer
244 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 ...
0
votes
0answers
113 views
Displaying ArcGIS Online vector tile layer in Leaflet using Leaflet.VectorGrid Not displaying correctly
I have created a Vector Tile Package using ArcGIS Pro and uploaded it to ArcGIS Online. I am trying to load the layer into a leaflet map using the Leaflet.VectorGrid plugin. It successfully loads but ...
1
vote
0answers
35 views
Obtaining least number of grids (polygons) covering a separate polygon while the grids are overlapping
I have grids as polygons where the grids are overlapping. I want list of grids covering a separate polygon. The image below demonstrate the problem. The red lines are the edges of the grids and the ...
0
votes
1answer
47 views
Using ModelBuilder to create different layers by selecting all attributes that intersect each grid index cells
I have a large grid index layer and point layer. I want to use ModelBuilder that will select each cell in the grid index layer, then perform a select by location to select all the points within each ...
