Refers primarily to graticules and questions about drawing or constructing them. Use the `raster` tag for questions about grid-based datasets.

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2answers
962 views

UTM Grid as a Layer with Leaflet

How can I display a UTM Grid as a layer with Leaflet? Search a way to embed a OpenStreetMap map with Leaflet in a website. Particularity. I want to display a UTM Grid as a Layer. In addition, lower ...
2
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1answer
541 views

How to export vector features to grid using proxy and WFS protocol?

I am trying to export vector features (current view) as a grid, something like: http://workshops.opengeo.org/geoext/wfs/grid.html so far layer features are not being retrieved.. I got empty grid in ...
2
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0answers
39 views

Changing grid orientation of a raster

I'm trying to load some XYZ data into a program called OpendTect. However, the orientation of the existing data is different from the grid orientation of the XYZ file. this makes it imposible to load ...
2
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0answers
42 views

Extracting gridded data from polygon vector layer

So I've spent a few enjoyable (and frustrating) days teaching myself the basics of QGIS and fiddling around to try get some data output I need to drive some calculations. Sadly I'm not having any joy ...
2
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0answers
64 views

How to move points to another polygon based on attribute?

I have a point layer and a grid cell/fishnet layer. Each point falls within a grid cell. Now I want to move some of the points to another (the nearest) grid cell based on an attribute that exists in ...
2
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0answers
107 views

Is there a decent algorithm in QGIS Process Modeller to create a grid?

I am using Process Modeller to automate merging several vector layers and then creating a grid to cover the extent of the merged layer. There are functions which already exist which are not listed in ...
2
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0answers
108 views

How can I improve the resolution of a vector grid made in north pole stereographic projection?

I've been struggling with this for a while and wondered if someone could lend a hand. I have a map which already has sampling points from centroids in a 35x35km grid that was created in north pole ...
2
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0answers
362 views

GDAL: Geotransform - rotated rasters (and ArcGis)

I am working on a GDAL driver for a proprietary grid-format. In some cases, the grids are rotated in order to get smaller file sizes. In my GDAL geotransform array, I do the following (showing a ...
2
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0answers
40 views

simple raster format to use in Web applications?

I'm building a Web application in which users create and edit very coarse raster data. They're assigning values to cells in a georeferenced grid. Right now I'm storing the values in a multidimensional ...
2
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0answers
134 views

Plot the Shortest Paths in a Grid without any clash at a point of time

The efficient algorithm needs to be done and proved for the best solution for the given problem: User inputs: (#) Size of the NxN Grid. (N); (#) No. of Paths: Z; (#) Source and Destination ...
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3answers
1k views

how to create grid to divide large map into smaller sections

This seems like it should be easy but I just can't find anything online that tells me how to do it. I have a map of small remnants of forest along creeks for an entire county in California. I need ...
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1answer
1k views

Overlay lat/long graticules on projected map QGIS

I am using an equal areas projection of North America and would like to overlay a lat/long grid. I can do this in the print composer, but only for the coordinates. Can QGIS do a distorted grid for ...
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2answers
516 views

Arcpy (10.0) and centroids/points shapefile

I'm trying to create a point shapefile from a grid index polygon shapefile I created using arcpy. I know this is simple, but could anyone give a few pointers out there. Here is what I've done now: but ...
1
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1answer
39 views

Why are color settings are not saved when exporting to a new file?

I extracted with QGIS a municipality from a state map, then divided it with a grid. I don't want the borders of the grid features to be seen so I changed the color of the map and the color of the ...
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2answers
102 views

Distribute gridded data to corresponding subbasin boundaries

I have one ArcGIS shapefile of my river basin consisting of many subbasin. Another shapefile showing the location of gridded points over the whole basin (Its latitude and longitude are used as file ...
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1answer
677 views

How to convert a polygon to a grid of polygons using QGIS?

For example, the city of Rotterdam represented as a hexagonal grid.
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2answers
116 views

AML routines and python

I´m trying to use some AML files in ArcMap 10, but I have noticed that this option is not available for this version. Does anyone know or tried to "translate" the aml sequences to another language ...
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2answers
30 views

attach point grid data non-grid points

Possibly a strange one: I have a dataset with loads of fields of environmental (explanatory) data, as a regular grid of points (black dots in image), and another dataset of sampled (response) values ...
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2answers
104 views

gdal_grid has some problem with reading vrt file

I am using gdal_grid module(from gdal 1.10) and it has some problem with reading the vrt file. I checked this link but it does not work. gdal_grid problem reading vrt file The command is ...
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1answer
121 views

Convert point to grid: Numbers of cells differ

In R I am trying to aggregate points data to a grid. The data for the grid (G-Econ) comes as a csv-file. In this file each row represent a grid-cell at 1x1 degree resolution and the given ...
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1answer
72 views

Which kind of grid format is this?

in a project I got some raster files with the following content (header and data are in one txt file): HOUR 17 MINUTES 30 YEAR 2012 MONTH 5 DAY 4 CITY Emilia;Bologna NROWS 99 NCOLS 156 ULXMAP ...
1
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1answer
151 views

Auto increment a new column using Model Builder Field Calculator in QGIS?

I am making a model which requires creating a grid and clipping various layers to it. Using the Create grid function does not provide an ID column, instead it creates 2 columns: "longitude" and ...
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1answer
74 views

How to Lock Grid and Scalebar in QGIS Atlas

Have just started using Valmeira and I am looking at generating an Atlas. I am using irregularly sized features as the index. The challenge I have, is when I set up the template page and scalebar ...
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2answers
58 views

How can I change vector grid extents in QGIS?

I created many vector grids, but later I discovered that I need to modify some of their extents, hence, How can I change vector grid's extents (xmin, xmax, ymin and ymax) in QGIS?
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1answer
72 views

Why does vector grid creation crash?

Im trying to create a vector grid for a municipality. Do you know why does it crash? The scale I'm using is 1:1000000. Any tips? Thanks!
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2answers
175 views

Integrate grid and polygon of municipalities keeping the biggest municipality per cell with QGIS (or another)

I have a 9x9 grid and a polygon of municipalities of an extensive area of Brazil. My goal is to have a field indicating the biggest municipality per grid cell. I've been trying with intercept without ...
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1answer
163 views

How to make grid lines opaque so just lat/long coords are on map border?

Can any one help me with adding graticules to my map? I have managed to add a lat/long grid over my map, however I want the grid lines to be opaque with just the lat/long coords on the map border - is ...
1
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1answer
109 views

ArcGis: Rotated grids and cell size

I am using ArcObjects, namely RasterGeometryProc, to apply rotation on grids. The transformation works fine. However, when looking at the grids properties in ArcGis, the cell sizes has changed. ...
1
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1answer
111 views

Dividing map into features (whole squares)

I'm using QGIS 1.8.0. I divided a map of a state with its municipalities into many features using a GRID (small squares), but instead of creating one ID per feature (one ID per square), it creates one ...
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2answers
386 views

Openlayers Plugin, Project CRS and Grids in Composer

Apologies in advance for the potential for this to be a duplicate question, I've had a good look, and I can't see a solution thatI understand well enough to help me. I have my project CRS set to a ...
1
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1answer
164 views

How can I bring in grid files from Geographix into ArcGIS?

I have a set of grids of subsurface horizons, created from contours, that I have created in Geographix and am having trouble brining them into ArcGIS. Currently when I try to export the grid ...
1
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1answer
819 views

How to draw grid cells in QGIS?

I have one ASCII text file with eight columns. The first four provide the x-coordinates (e.g. longitude) of the four corners of a grid cell, while the last four provide the y-coordinates (e.g. ...
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1answer
1k views

Generating Map Tiles for MGRS Grid Graticule

I'm possibly a bit out of my league here, but ready to get my hands dirty. I want to generate map tiles for a MGRS grid graticule similar to http://tiles.mapbox.com/mapbox/map/afghanistan-mgrs. I ...
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0answers
18 views

Vector Layer Symbol (ism) properties?

I would like to streamline the render of a polygon grid vector layer as a simple line (no fill) via Python coding. I am I bit confused by the implementation referenced by the API. Is it possible to ...
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0answers
21 views

Can a joined-layer have its attribute changed depending on what layers are selected/deselected?

Using QGIS, I have a polygon-grid layer which covers everything, Layer_All joined with 2 other grid layers: Layer_1 and Layer_2, both of which intersect at various points. I would like Layer_All to ...
1
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1answer
140 views

How can I add grid lines to a print composition using pyqgis?

I'm writing a qgis plugin to create an image in the print composer of the current map. I can get the map rendered in the proper place with a frame of the right width, and I can get grid annotations ...
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0answers
84 views

How can I draw georeferenced WGS84 grid on Android?

I'm planning to display a grid which is georeferenced and show the lat/long of the particular location depending on zoom level. I want to display something similar to what MOBAC has as an option ...
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0answers
285 views

Updated: Openlayers Vector Layers with Google Map Base Layer (via Grid): Vectors Stick but can't get correct resolution/projection

Revamping this question instead of opening a new one. Previous issue: vector layers were not "sticking" to the map, so when you would zoom in or out the vector layers would "come out" at you. Note ...
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0answers
87 views

ArcMap 100k meters square identification - double?

ArcMap - 1:50.000 - 5x3 meters - MGRS I put on a grid defined with the standard 1:50.000 grid style in ArcMap. I tick the box for "100,000 meter grid square identification", but it makes it ...
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0answers
84 views

How to rotate u and v components of wind in rotated gribs?

I have a grib message of a rotated hirlam product. The gribmessage states, that the u and v component contained are relative to the rotated grid. How can I unrotate them?
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0answers
107 views

Problem using grid with a vector layer

I need to establish a model of maritime pollution and I try to use the grid option to work on ocean sectors. I tried to use my grid on a vector file, .shp, with points. Each point is a maritime ...
1
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0answers
121 views

Arcobjects - Properties Grid

Does anybody know a way, in VBA, to change the grid interval? For example: if my layout´s scale is 1:2000, my grid will have 200 meters interval and my layout´s scale is 1:5000, my grid will have 500 ...
0
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1answer
714 views

Exporting Grid from R to use it in ArcGIS

i want to export a grid from R into format readable by ArcGIS. how can i do so? jones
0
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1answer
224 views

Measure length within a grid

I have a grid and some lines within a grid and I was wondering how to measure the length of the lines inside the grid. I can use the measure tool for a straight line, however in the future I will not ...
0
votes
1answer
72 views

How to know the real size of grid? [duplicate]

Im working with QGIS. When dividing a map with a grid I set in the paramters X=0.1 and Y=0.1. Could someone please explain what does that mean? I mean would the map be divided into 100mx100m squares? ...
0
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2answers
132 views

Can Vector grid shape file be clipped with Satellite image in qgis?

I am working in open layers plugin in Qgis . in order to project the satellite image wit respect to vector shape file i am having, Andre Joost suggested me to create a vector grid with crs sysytem of ...
0
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1answer
22 views

Assign world file to many tiff obtained using a grid/reticulate

I've many .tiff exported on the base of a grid/reticulate, and now I need to make them georeferenced. There is an automatic method that allow this using the coordinates of the vertexes provided from ...
0
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1answer
88 views

How to create a grid after merging shapefiles?

Follow up question to QGIS Model Builder Script - Possible to merge layers in a folder? I think I'm missing something very obvious here but can't seem to find it. After merging shapfiles in a folder, ...
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1answer
1k views

How to convert a bil image into grid in ArcGIS?

GIS beginner here. I've downloaded RFE data from FEWSNET. It's a compressed file which includes .bil files. Now i want to convert this ".bil image" into a grid to use the precipitation data in an ...
0
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1answer
177 views

Polygon grid shape file for landmass

I am interested in generating a polygon grid shape file for the landmass of the world. What I have presently is two tables in postgreSQL. Table 1: Coastal area shapefile ...