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1
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2answers
32 views

Road-construction (alignment) tools

Are there any tools available in any GIS environment for route alignment? To be specific, the tool should take a DEM and road-construction parameters -- distance and gradient, roadfill, drainage ...
0
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1answer
49 views

Aligning two layers captured in different coordinate systems

I have two layers, one of points (locations of fruit trees) and one of Atlanta zip codes, in an ArcMap, but the layers are not aligning. The zip codes are in the top right and the fruit points are ...
1
vote
1answer
61 views

How do I know the cause of my spatial error?

A (probably?) very basic question about spatial error it's about time I knew how to think about and answer correctly. I have some data plotted from XY coordinates. I look at them and it turns out ...
0
votes
0answers
70 views

Google and Croatia WMS do not line up with shapefiles (500 meter to East)

I am working on a project in Croatia. I can use the WMS files from geoportal.dgu.hr/wms. These line up perfectly with the google maps. As project CRS I use HTRS96/TM which has become standard in ...
1
vote
1answer
95 views

Merging many map sheets together into one large sheet for later georeferencing?

I have hundreds of images, each one is a scan of a map sheet, and I want to georeference them. The maps cover a large area (a whole country), they just split the area into many smaller cells. Each map ...
1
vote
1answer
128 views

Aligning text/features on a map

Sorry for the simple question .... but something odd is happening in ArcMap & I don't know why. When I want to align text or features relative to each other, they are aligning relative to the ...
1
vote
2answers
271 views

Clip_management to raster extent outputs larger raster than raster extent

Using Python and ArcMap 10.0 SP5, I'm trying to reproject and clip a large input raster to exactly the same grid as a smaller target raster (same extent, pixel sizes and projection). The problem is ...
2
votes
1answer
212 views

How to realign (PostGIS) layers in QGIS?

I'm trying to realign layers in QGIS. As you can see here, the "background" light-blue layer is not aligned with the top layers. I'm working with pgAdmin III and importing PostGIS Layers in QGIS. My ...
2
votes
0answers
150 views

how to align vector and raster images? [closed]

How to align vector and raster images? For example vector images will be static/rigid and raster image will be morphable. For example I manually do initial guess and algorithm must converge to optimal ...
2
votes
1answer
192 views

How to align labels using Label toolbar?

I'm worried I'm missing something terribly obvious here: how do you set the alignment (left / centre / right) for feature labels? I'm referring to QGIS 1.8, and using the 'Label' toolbar, rather than ...
5
votes
6answers
2k views

How can I align two non-coincident equi-resolution raster grids?

I have two rasters: a digital elevation model (DEM) and a Landsat band. The grid resolution of both is 30 m, but the grids are not coincident (see image: the dark raster on top is the DEM; the light ...
4
votes
2answers
1k views

How to draw polygons in QGIS perfectly aligned

I would like to draw polygons for an indoor map test and would like to draw perfect rectangles (horiz. and vertical edges). How to set QGIS options on polygon edit /draw to do that ? thank you for ...
2
votes
1answer
428 views

using google maps, the mouse cursor and the dot on the map not inline

i'm trying to implement the example http://openlayers.org/dev/examples/drag-feature.html . When i'm implementing this with a Google map, I have a strange bug: the mouse pointer and the dot on the map ...