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Google Earth

google earth precission

How accurate are the images in Google Earth?

The theme of orthorectified  and satellite images’ precision of Google Earth is a record question in search engines; in these days where confusing precision with tolerance is as easy as losing the GPS in the taxi, it would be good to make a couple of analysis about whether or not to use these data for […]
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View coordinates in Google Maps, using ANY! other coordinate system

Until now it has been common to input UTM and geographic coordinates on Google Maps. But usually that supports keeping the datum is WGS84 Google. But: What if we want to see in Google Maps, a coordinate of Colombia in MAGNA-SIRGAS, WGS72 or PSAD69? What if we want to see a coordinate of Spain in […]
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In Google Earth pro, do images have better resolution?

Apparently there is some confusion about what Google Earth paid versions offer; there are those who believe that they are obtained coverage of better resolution. Indeed, you get better resolution, but no more coverage than what we see, what these tools offer is output better quality, for example to view, print, save, or send to […]
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How to insert local images in Google Earth

In response to some questions I receive, I take advantage to leave the outcome for public use. Some time ago I had spoken how you can insert images linked to Google Earth point, but using Web addresses. In this case I want to show it using a local path: Assuming that the file is set […]
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Google Earth; visual support for cartographers

Google Earth beyond being a tool for general entertainment has also become a visual support for mapping, both to show results as to review if work done is consistent; it also serves as a teaching tool for geography or geodesy classes. In this case I’m going to get assisted by Manifold GIS to build the […]
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KloiGoogle to connect Google with your GIS program

This is an application that goes beyond the simple, but in practice resolves what we all want to be as simple like: On this side Google Maps —-> Satellite layer Hybrid layer Map layer Topographic layer On this side my GIS program ArcGIS Mapinfo GeoMedia Microstation Bentley Map For a moment I thought it was […]
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Google ContouringGE, it can be done!

TRANSLATION NOTES: Please read some comments at the end of this post. A few days ago a friend asked me how to do to see the contour lines in Google Earth using an application called ContouringGE 1.1 that is supposed to work with any 4x version, Windows XP or Vista. And because definitely I couldn’t, […]
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Facebook: videos for surveyors

TRANSLATION NOTES: Please read some comments at the end of this post. At giant steps Facebook is becoming a common tool for business and education. Being an “Internet of people” companies have become the first look at the people interconnected with each other, which has given it a value beyond the conventional network. One of […]
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118 topics of the FOSS4G 2010

The best that can be of these events are in PDF presentations that are very useful for reference in forming processes or decision making, especially in these times that the open source geospatial world has matured dramatically. It is a good example of human creativity, which recycles and diversifies the same concept with innovations that […]
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How Mapserver works

TRANSLATION NOTES: Please read some comments at the end of this post. Last time we talk about some criteria of why MapServer and its basic installation. Now let’s look at some of its performance in a mapping exercise from the Chiapas buddies (*). Where it is mounted Once installed Apache, the default publishing directory for […]
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Deciding for MapServer

TRANSLATION NOTES: Please read some comments at the end of this post. Taking advantage of a recent conversation with a Cadastre institution that sought with what to publish their maps, I summarize here the most important to return the item bailouts to the community. Maybe in time it’ll serve someone who wants to make a […]
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Draw on line on Google Maps

Let’s imagine that we need to send a client a sketch map so he can view it online or in his GPS Navigator. For example, if we have a parcel for sale with the path to get there and its road’s indications. Another example could be an area of the MODIS satellite view from that […]
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It’s available PlexEarth Tools 2.0 Beta

One day ago I spoke of the new features that would bring PlexEarth Tools for AutoCAD’s version 2.0, one of the most practical developments that I have seen on Google Earth from a member of the Autodesk Developer Network (AND). Today it has been released the Beta version, which can be downloaded, tested and what […]
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Contours from polylines (Step 2)

In the previous post we had georeferenced an image that contains contours; now we want to turn it to Civil 3D contours. Converting image curves to digital mode For this there are programs that virtually automate the process like AutoDesk Raster Design, equivalent to Bentleys Descartes or ESRI’s Arcscan. In this case I’ll do it […]
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Contours from polylines (Step 1)

Earlier we saw how to create contours based on a points’ network taken in the field. Now we’ll see how to do it, from existing curves in a scanned map. As we did with the design of roads, let’s split the process into steps, so that the post won’t go longer than a snake fart. […]
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